HomeMy WebLinkAbout2023-06-06; Beach Preservation Commission; ; Position of preference on one of the preliminary conceptual roadway options for the South Carlsbad Boulevard Climate Adaptation Project Meeting Date: June 6, 2023
To: Beach Preservation Commission
From: Kyle Lancaster, Parks & Recreation Director
Staff Contact: Tom Frank, Transportation Director/City Engineer
Tom.frank@carlsbadca.gov
Katie Hentrich, Senior Program Manager
Katie.hentrich@carlsbadca.gov
Subject: Position of preference on one of the preliminary conceptual roadway
options for the South Carlsbad Boulevard Climate Adaptation Project
Recommended Action
At the request of Beach Preservation Commission Chair Steindlberger and Commissioner
Woolsey, consider taking a position of preference on one of the preliminary conceptual
roadway options for the South Carlsbad Boulevard Climate Adaptation Project.
Executive Summary
Three roadway options have been designed for a one mile stretch of south Carlsbad Boulevard,
from Manzano Drive to Island Way, as part of a project funded by a grant from the California
State Coastal Conservancy. The grant is intended to demonstrate how cities can move and
adapt infrastructure based on the latest modeling of sea level rise and its hazards.
The project was also designed to comply with the California Completed Streets Act, the City of
Carlsbad’s General Plan Mobility Element and the City of Carlsbad’s Climate Action Plan.
Due to the requirements of the grant, the project team focused on changes to the roadway, not
the uses to the land that could be repurposed as a result of moving the road to the east. The
initial three options include:
•Four-lane road with traffic signals
•Two-lane road with roundabouts
•Two-lane road with roundabouts and one enhanced pedestrian crossing
At the Dec. 7, 2022 Beach Preservation Commission Special Meeting, the Commission discussed
taking a position of preference on one of the preliminary conceptual roadway options, in
addition to the adaptation options included in the Las Encinas Creek Habitat Restoration
Analysis. Staff provided a short presentation on the status of the project and highlighted future
opportunities for the Commission to provide input beyond the scope of the current grant-
funded effort. The Commission stated that they would like to provide a position of preference
on the preliminary roadway options prior to the item returning to City Council.
June 6, 2023 Item #2 1 of 88
BEACH PRESERVATION COMMISSION
S ff·. R ta · e o t .
This report will present the options again, with added detail on the traffic study results and how
the options have been modified based on community input.
Discussion
The city is working on a California State Coastal Conservancy grant-funded project to
demonstrate how a portion of Carlsbad Boulevard could be moved away from hazards caused
by sea level rise.
An end product of the study will be a conceptual design of how southbound Carlsbad Boulevard
from Manzano Drive to Island Way could be moved to the east.
The South Carlsbad Climate Adaptation project is intended to:
• Move and protect infrastructure from hazards caused by sea level rise
• Provide a safe and efficient roadway for all modes of travel
• Promote walking, biking and other forms of active transportation
• Calm traffic along the coastline for safety
Guiding principles
The project improvements are proposed in accordance with local policies previously approved
by the City Council, including the Mobility Element of the General Plan, the Sustainable Mobility
Plan and the Climate Action Plan.
Mobility Element
The overarching document that identifies the city’s core transportation goals is the city’s
General Plan Mobility Element, which the City Council approved in 2015. This replaced what
was called the Circulation Element, a plan largely based on the circulation needs of a single
mode of travel – the car.
The Mobility Element sets forth several goals related to sustainable mobility:
• Keep the City of Carlsbad moving with complete streets that provide a safe,
balanced, cost effective, multi-modal transportation system (vehicles,
pedestrians, bikes, transit), accommodating the mobility needs of all community
members, including children, the elderly and the disabled. (Goal 3-G.1)
• Improve connectivity for residents, visitors and businesses. (Goal 3-G.2)
• Provide inviting streetscapes that encourage walking and promote complete
streets. (Goal 3-G.3)
• Implement transportation demand and traffic signal management techniques to
improve mobility. (Goal 3-G.5)
• Protect and enhance the visual, environmental, and historical characteristics of
the City of Carlsbad through sensitive planning and design of scenic
transportation corridors. (Goal 3-G.6)
• Provide for the safe and efficient movement of goods throughout the city. (Goal
3-G.7)
June 6, 2023 Item #2 2 of 88
Coastal street
Not all streets have the same purpose. Some serve residential neighborhoods, some are more
traveled routes and some are major thoroughfares. That dictates how they are designed.
In the Mobility Element, south
Carlsbad Boulevard falls under the
category of a coastal street.
• Primary purpose is to move
people along the city’s
ocean waterfront and
connect people to the
beach, recreation,
businesses and residences in
close proximity to the
waterfront. The street
serves as a destination for
people who seek to drive,
walk and bicycle along the
ocean waterfront.
• Designed to safely move all
modes of travel while
enhancing mobility for
pedestrians and bicyclists.
• Vehicle speeds shall be managed to support uses along the coast.
• Enhanced bicycle and pedestrian crossings should be provided, including:
o High visibility crosswalks
o Enhanced pedestrian notifications (e.g., responsive push-button devices)
o Enhanced bicycle detection
o Bicycle lanes, which can be further enhanced or complemented by other
facilities (such as bicycle lane buffers or off-street pathways).
• Pedestrian facilities should be a minimum of 5 feet and the city shall strive to make
them 6 feet to 8 feet in width, and they shall conform to ADA requirements.
• Pedestrian crossing distances should be minimized.
• Trail facilities should be encouraged.
• Opportunities for mid-block pedestrian crossings should be investigated.
• On-street parking should be provided.
• Transit facility and operation improvements should be encouraged.
Sustainable Mobility Plan
The city’s Sustainable Mobility Plan includes specific guidance on the consideration of roundabouts for
intersection control. It states,
“The City of Carlsbad recognizes that roundabouts are an effective intersection
traffic control measure to calm traffic and improve safety of intersections for
pedestrians, bicyclists, and vehicles by reducing speeds and conflict points.
June 6, 2023 Item #2 3 of 88
Project area
-Arterial Streets
-Identity Streets
VIiiage Streets
-Neighborhood Connector Streets
-Arterlal Connector Streets
-Coastal Streets
Roundabouts have added benefits of improving efficiency of vehicle operations
of intersections, reducing greenhouse gas emissions from idling vehicles and
enhancing aesthetics. Roundabouts will be considered on existing city streets
where they could effectively address safety or traffic operations issues or in new
development projects when intersection control is being considered…”
Climate Action Plan
The City of Carlsbad’s Climate Action Plan sets a greenhouse gas reduction target of 52% below
2012 levels by 2035.
The Climate Action Plan identifies transportation as the largest source of greenhouse gas
emissions in Carlsbad. To reduce greenhouse gases, the plan calls for encouraging more walking
and biking and managing vehicle speeds. Roundabouts, with their continual, slower-moving and
efficient traffic movements, produce fewer greenhouse gases than traffic signals.
State of emergency
Traffic safety is top priority in the City of Carlsbad. On August 23, 2022, the City of Carlsbad
declared a local emergency following a more than 200% increase in collisions involving bikes
and e-bikes since 2019. The City Council provided $2 million in emergency funding and asked
staff to prioritize projects that would redesign streets to encourage safer behaviors.
The South Carlsbad Climate Adaptation Project was already underway prior to the emergency
declaration, but its objectives to balance the roadway for all users and prioritize traffic safety
support the Safer Streets Together plan.
Analyzing the options
Traffic study
At the July 5, 2022, Traffic & Mobility Commission meeting, the commission requested
additional traffic study results before providing a recommendation to the City Council. The city
executed a Professional Services Agreement with Michael Baker to conduct a Transportation
Assessment Study (traffic study). The traffic study methodology conforms with the city’s
General Plan and follows similar practices used for other traffic studies or other projects that
require a coastal development permit.
For the traffic study (Exhibit 1) calculations project the average time vehicles would wait at
intersections during peak hours (known as delay) during existing conditions and the projected
2035 conditions, which consider growth projections from the San Diego Association of
Government’s Regional Transportation Demand Model, in different seasons of the year:
• Fall weekday and weekend
• Summer weekday and weekend
Under all scenarios during peak periods in different seasons, the roundabout option resulted in
the least amount of delay for drivers. This means traffic will move more efficiently through the
roundabout compared to the intersection with a traffic signal, even during the highest levels of
traffic.
June 6, 2023 Item #2 4 of 88
Carlsbad Boulevard and Palomar Airport Road scenario *
*Based on vehicle traffic analysis provided in Exhibit 1: Transportation Assessment - Table 16,
pages 52-59.
Better conditions for pedestrians and bicyclists
Sidewalks or basic ADA compliant features are currently not provided on either side of Carlsbad
Boulevard from Manzano Drive to Breakwater Road. At the time of the traffic study, both sides
of Carlsbad Boulevard had six-foot bike lanes.
Pedestrian and bicycle improvements would be made for either of the options, traffic signal or
roundabout, with dedicated space for buffered bike lanes, new sidewalks and reduced vehicle
lane widths.
Revisions of preliminary conceptual roadway options at Turnarounds Beach
To improve the footprint of the proposed road, reduce the conflict points for users and lower
the cost, the design team revised the driveway to the State Park parking area along Carlsbad
Boulevard west of Palomar Airport Road, commonly known as Turnarounds. Instead of the
need to build a separate intersection for the parking area, the team designed its entrance to be
a fourth leg of the Palomar Airport Road roundabout intersection.
Community engagement
To ensure the roadway designs reflect the priorities of the community, city staff have been
working with the most-affected community members in the one-mile stretch of south Carlsbad
Boulevard. Over a series of meetings, presentations and on-site visits with residents of the
Solamar community and ownership of the Hilton Garden Inn Carlsbad, staff have received input
June 6, 2023 Item #2 5 of 88
Seconds to get through intersection ~
Traffic signal
Roundabout Reduction in wait time
0 10 20 30 40 50 60 70 80
■ Summer weekend ■ Summer weekday ■ Fall weekend ■ Fall weekday
on the project options, listened to concerns, and provided updates related to the project and its
next steps.
Specific input and concerns about the Solamar Drive intersection included:
• Safe passage of residents and hotel guests entering and exiting, pedestrian crossing
• Slowing down speeds
• Managing noise
• Bluff erosion and beach access specifically across Solamar Drive
Considering the most significant concerns raised by the adjacent community members and the
traffic study results, the design team changed four items from the previous design presented to
the Traffic and Mobility Commission in September 2022 including:
• Revising the roundabout design at Palomar Airport Road to move the roundabout
approximately 60 feet to the north. This allows the city to set aside some of its right-of-
way to construct an optional right turn bypass for northbound traffic on Carlsbad
Boulevard to eastbound Palomar Airport Road in the future, if needed.
• In Option 2, including a description that when coastal erosion prohibits the operation of
the roundabout, the city would then pursue converting the intersection to a
conventional traffic signal intersection with one through vehicle travel lane in each
direction with turn lanes. The traffic signal at Solamar Drive will also allow for left turns
out of Solamar Drive which will slightly increase the vehicle Level of Service of the
Palomar Airport Road intersection considering less vehicles will be making U-turns at
Palomar Airport Road. This modifies option 3 - two-lane road with roundabouts and one
enhanced pedestrian crossing at Solamar Drive.
• The city will install conduit during construction of roundabouts on Carlsbad Boulevard to
facilitate traffic signals in the future, if needed.
• Including Rectangular Rapid Flash Beacons at the Carlsbad Boulevard and Solamar Drive
roundabout to support safer pedestrian crossings and visibility for drivers.
Last, staff presented the results of the traffic study and revisions to the Traffic & Mobility
Commission on June 5, 2023.
Traffic safety for all modes of transportation
While roundabouts keep people moving, they do so at lower and more consistent speeds,
which greatly reduces the risk of injury. According to the Transportation Research Board, part
of the National Academies of Sciences, Engineering, and Medicine, and the National
Cooperative Highway Research Program, roundabouts have been found to provide:
• More than 90% reduction in fatalities
• 67% reduction in injuries
• 35% reduction in all crashes
• Slower speeds that are generally safer for pedestrians
June 6, 2023 Item #2 6 of 88
The Federal Highway Administration reports that roundabouts reduce the frequency and
severity of crashes by:
• Eliminating the most severe types of crashes: high angle movements including right-
angle, left-turn and head-on collisions
• Decreasing relative speeds approaching and through the intersection. Lower speed is
associated with better yielding rates and reduced vehicle stopping distance
• Minimizing the difference in speed between road users
• Shortening the pedestrian crossing distances and having pedestrians cross only one
direction of traffic at a time at each approach
• Decreasing vehicle-to-vehicle, pedestrian-to -vehicle and bicycle-to-vehicle conflict
points
Managing noise
• The new roadway would replace the old concrete used for the original Highway 101,
which causes a loud repetitious “clunking” noise
• New pavement would facilitate a smoother drive
• Slower moving vehicles, facilitated by the design of a roundabout with one vehicle lane
in each direction, will make less noise
• Roundabout also promote more gradual deceleration and acceleration which
significantly reduces engine noise and racing off the line which occurs during red lights
at intersections with traffic signals
Bluff erosion near Solamar Drive
• The ocean bluffs just west of Solamar Drive are one of the most at-risk areas for bluff
erosion.
• To balance the needs of environmental sustainability and traffic safety, staff will add a
description in option 2, that when coastal erosion prohibits the operation of the
roundabout, the city would then pursue converting the intersection to a conventional
traffic signal intersection with one vehicle travel lane in each direction with turn lanes.
• This option would modify the original option 3 and facilitate safe passage of residents
and hotel guests entering and exiting and pedestrian crossing at Solamar Drive.
• The transportation study results also support the roundabout and eventual single lane
traffic signal intersection control for Solamar Drive, which has less traffic volume than
other intersections in the grant-study area.
Traffic congestion along the coast if Interstate 5 is backed up
From traffic data collected in 2022, vehicle traffic on Carlsbad Boulevard between Island Way
and Palomar Airport Road reached up to approximately 19,000 average daily trips in future
projections. Roundabouts can typically manage traffic volumes up to 25,000 average daily trips
before experiencing unnecessary delay and queuing.
When there are circumstances of I-5 backing up, the proposed options will not make the
conditions worse than the existing conditions, and will improve conditions for all modes during
June 6, 2023 Item #2 7 of 88
congested periods and when traffic conditions are normal. Additionally, El Camino Real is
capable of handling upwards of 60,000 average daily traffic and is programed with coordinated
traffic signals to improve efficiency and minimize delays for people traveling north-south.
Fiscal Analysis
No city funding is being requested at this time.
Next Steps
The grant does not include funding to conduct environmental analysis, design beach access
points, uses for the land that could be repurposed as a result of moving the road to the east or
to build the new road. Funding for this grant ends Feb. 28, 2024.
To meet grant requirements, the city needs to complete a 30% conceptual design of how
southbound Carlsbad Boulevard from Manzano Drive to Island Way could be moved to the east
to adapt to climate change impacts. Other remaining tasks include a long-term master plan that
discusses adaptation options for the project area over time. A decision on the adaptation
options are not part of this grant and early stages of the project. That decision will be made at a
later time when staff have further direction from the City Council for next steps of this project.
At this time, no additional work has been included in the city’s fiscal year 2022-23 and 2023-24
budgets for future phases of this project or for the full length of south Carlsbad Boulevard.
The City Council will receive the updated traffic study analysis and provide a recommendation
on the preferred design option later this year, allowing the city to complete the grant study by
the deadline.
Environmental Evaluation (CEQA)
The California Environmental Quality Act (“CEQA”), and its implementing regulations (“CEQA
Guidelines”) adopted by the Secretary of the California Natural Resources Agency, list classes of
projects that have been determined not to have a significant effect on the environment and as
a result are exempt from further environmental review under CEQA. The City Planner has
determined that this report is statutorily exempt from the requirements of CEQA pursuant to
CEQA Guidelines section 15262, Feasibility and Planning Studies; and 15378(b)(5), which
exempts organizational or administrative activities of governments that will not result in direct
or indirect physical changes in the environment. This organizational and administrative activity
relates to the ongoing study of preparing an adaptation plan for a portion of a roadway
segment in the city (South Carlsbad Boulevard Climate Adaptation Project). This general
direction does not have a legally binding effect on any possible future discretionary action.
Public input received and technical information prepared during the planning process will be
utilized in preparing a future environmental review document to support the South Carlsbad
Boulevard Climate Adaptation Project.
Exhibits
1. Transportation Assessment Study
June 6, 2023 Item #2 8 of 88
1
South Carlsbad Boulevard Coastal Project- Transportation Assessment
South Carlsbad Boulevard
Coastal Project
transportation assessment
May 2023 - DRAFT
PREPARED BY:
MICHAEL BAKER INTERNATIONAL
Exhibit 1
June 6, 2023 Item #2 9 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment2
TABLE OF CONTENTS
TABLE OF CONTENTS
CHAPTERS
TABLE OF CONTENTS ......................................................................................................................................2
EXECUTIVE SUMMARY ....................................................................................................................................6
Project Description .............................................................................................................................................7
INTRODUCTION & METHODOLOGY .............................................................................................................10
Introduction & Methodology ...............................................................................................................................11
Study Area ........................................................................................................................................................16
Study Scenarios ..............................................................................................................................................16
Analysis Approach & Methodology ...................................................................................................................20
EXISTING CONDITIONS .................................................................................................................................24
Existing Facilities .............................................................................................................................................25
VEHICLE TRAFFIC ANALYSIS ........................................................................................................................32
Traffic Volumes ................................................................................................................................................33
Baseline Intersection Analysis ..........................................................................................................................42
Proposed Project Improvements Intersection Analysis ....................................................................................50
Queuing Assessment ......................................................................................................................................66
Alternative Considerations ...............................................................................................................................67
BICYCLE & PEDESTRIAN MMLOS ANALYSIS ..............................................................................................68
Conclusions .....................................................................................................................................................78
Exhibit 1. Regional Context ............................................................................................................................12
Exhibit 2. Option 1: 4-Lane Road with Traffic Signals......................................................................................13
Exhibit 3. Option 2: 2-Lane Road with Roundabouts .......................................................................................15
Exhibit 4. Option 3: 2-Lane Road with Roundabouts and Enhanced Pedestrian Crossing .............................15
Exhibit 5. Study Area .......................................................................................................................................17
Exhibit 6. General Plan - Mobility Element Street System .............................................................................19
LIST OF EXHIBITS
June 6, 2023 Item #2 10 of 88
3
TABLE OF CONTENTS
South Carlsbad Boulevard Coastal Project- Transportation Assessment
Exhibit 7. Existing Intersection Lane Configuration .........................................................................................26
Exhibit 8. Existing Pedestrian Facilities ...........................................................................................................27
Exhibit 9. Existing Bicycle Facilities .................................................................................................................29
Exhibit 10. Existing Transit Facilities .................................................................................................................30
Exhibit 11. Existing Summer Weekday Am/PM Peak Hour Volumes & Average Daily Traffic Volumes ............34
Exhibit 12. Existing Summer Weekend Midday Peak Hour Volumes & Average Daily Traffic Volumes ............35
Exhibit 13. Existing Fall Weekday AM/PM Peak Hour Volumes & Average Daily Traffic Volumes ..................36
Exhibit 14. Existing Fall Weekend Midday Peak Hour Volumes & Average Daily Traffic Volumes ..................37
Exhibit 15. Future Summer Weekday AM/PM Peak Hour Volumes & Average Daily Traffic Volumes ..............38
Exhibit 16. Future Summer Weekend Midday Peak Hour Volumes & Average Daily Traffic Volumes ..............39
Exhibit 17. Future Fall Weekday AM/PM Peak Hour Volumes & Average Daily Traffic Volumes ......................40
Exhibit 18. Future Fall Weekend Midday Peak Hour Volumes & Average Daily Traffic Volumes ......................41
Exhibit 19. Existing Summer Level of Service Summary ...................................................................................43
Exhibit 20. Existing Fall Level of Service Summary .........................................................................................45
Exhibit 21. Future Year 2035 Summer Level of Service Summary ....................................................................47
Exhibit 22. Future Year 2035 Fall Level of Service Summary ...........................................................................49
Exhibit 23. Option 1 Summer Level of Service Summary ..................................................................................53
Exhibit 24. Option 1 Fall Level of Service Summary .........................................................................................55
Exhibit 25. Option 2 Summer Level of Service Summary ..................................................................................57
Exhibit 26. Option 2 Fall Level of Service Summary .........................................................................................59
Exhibit 27. Option 3 Summer Level of Service Summary ..................................................................................62
Exhibit 28. Option 3 Fall Level of Service Summary .........................................................................................64
Exhibit 29. Existing Pedestrian MMLOS ............................................................................................................71
Exhibit 30. Existing Bicycle MMLOS .................................................................................................................72
Exhibit 31. Pedestrian MMLOS - Options 1-3 ...................................................................................................75
Exhibit 32. Bicycle MMLOS - Options 1-3 .....................................................................................................76
June 6, 2023 Item #2 11 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment4
TABLE OF CONTENTS
Table 1. Coastal Street MMLOS Criteria ..........................................................................................................18
Table 2. Intersection LOS Description and Thresholds ....................................................................................20
Table 3. MMLOS Thresholds ............................................................................................................................21
Table 4. Pedestrian MMLOS Criteria ...............................................................................................................22
Table 5. Bicycle MMLOS Criteria .....................................................................................................................23
Table 6. Existing Intersection LOS Summary - Summer Weekday .................................................................42
Table 7. Existing Intersection LOS Summary - Summer Weekend .................................................................42
Table 8. Existing Intersection LOS Summary - Fall Weekday .........................................................................44
Table 9. Existing Intersection LOS Summary - Fall Weekend .........................................................................44
Table 10. Future Year 2035 Intersection LOS Summary - Summer Weekday ..................................................46
Table 11. Future Year 2035 Intersection LOS Summary - Summer Weekend ..................................................46
Table 12. Future Year 2035 Intersection LOS Summary - Fall Weekday ..........................................................48
Table 13. Future Year 2035 Intersection LOS Summary - Fall Weekend ..........................................................48
Table 14. Roadway Option Features .................................................................................................................50
Table 15. Roadway Options Traffic Control Alternatives ....................................................................................50
Table 16. Option 1 Intersection LOS Summary - Summer Weekday ................................................................52
Table 17. Option 1 Intersection LOS Summary - Summer Weekend ................................................................52
Table 18. Option 1 Intersection LOS Summary - Fall Weekend ........................................................................54
Table 19. Option 1 Intersection LOS Summary - Fall Weekday ........................................................................54
Table 20. Option 2 Intersection LOS Summary - Summer Weekend ................................................................56
Table 21. Option 2 Intersection LOS Summary - Summer Weekday ................................................................56
Table 22. Option 2 Intersection LOS Summary - Fall Weekend ........................................................................58
Table 23. Option 2 Intersection LOS Summary - Fall Weekday ........................................................................58
Table 24. Option 3 Intersection LOS Summary - Summer Weekday ................................................................61
LIST OF TABLES
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5
TABLE OF CONTENTS
South Carlsbad Boulevard Coastal Project- Transportation Assessment
Table 25. Option 3 Intersection LOS Summary - Summer Weekend ................................................................61
Table 26. Option 3 Intersection LOS Summary - Fall Weekday ........................................................................63
Table 27. Option 3 Intersection LOS Summary - Fall Weekend ........................................................................63
Table 28. Intersection Operations - Future Year 2035 (Summer) .......................................................................65
Table 29. Intersection Operations - Future Year 2035 (Fall) ...............................................................................65
Table 30. Option 2 Queue Assessment - Carlsbad Boulevard at Palomar Airport Road ....................................66
Table 31. MMLOS Thresholds ............................................................................................................................69
Table 32. Existing MMLOS Summary .................................................................................................................70
Table 33. Roadway Option Features .................................................................................................................73
Table 34. Options MMLOS Summary .................................................................................................................74
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South Carlsbad Boulevard Coastal Project- Transportation Assessment6
ExEcutivE SummaryExecutive Summary
PROJECT DESCRIPTION
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7
ExEcutivE Summary
South Carlsbad Boulevard Coastal Project- Transportation Assessment
Executive SummaryPROJECT DESCRIPTION
The South Carlsbad Coastline Project aims to improve
the performance, access and safety for of all modes of
travel including vehicles, pedestrians, bicyclists, and
transit riders along Carlsbad Boulevard from Manzano
Drive to La Costa Avenue. Through this project, the city is exploring ways to make south Carlsbad Boulevard
more accessible to the community. The public was
asked to share their priorities for the entire 3-mile stretch
of Carlsbad Boulevard from Manzano Drive to La Costa
Avenue, including the road itself and the public land that could be freed up if the road were reconfigured.
Three roadway options have been designed for the first
mile, from Manzano Drive to Island Way, as part of a
grant-funded project by the California State Coastal Conservancy. The grant is intended to demonstrate how
cities can move and adapt infrastructure based on the
latest modeling of sea level rise and its hazards.
This Transportation Assessment evaluates the operating conditions associated with the three options developed
for the initial one-mile section of the project:
• Option 1: Four Lanes with Traffic Signals
• Option 2: Two Lanes with Roundabouts• Option 3: Two Lanes with Roundabouts and
Enhanced Pedestrian Crossing or Traffic Signal at
Solamar Drive
Details of each option are described and evaluated in this report. Analysis of the options is based on city
guidelines and input from the community regarding
corridor priorities as developed through a robust
outreach program for this project.
WHAT WE HEARD
• Safer bike lanes, including some
separated from the flow of car
traffic
• Safe, wide walking paths
• Less noise and air pollution from
traffic when enjoying the coast
• Slowing down traffic along the
coast
• Making it safer to cross the road to
get to the coast
• Maintaining ocean views for drivers
and residents who live along
Carlsbad Boulevard
June 6, 2023 Item #2 15 of 88
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7 □□□r
South Carlsbad Boulevard Coastal Project- Transportation Assessment8
ExEcutivE Summary
INTERSECTION ANALYSIS
Currently intersections along the corridor operate at
acceptable levels of service (D or better), with the
exception of Carlsbad Boulevard and Island Way which is currently operating at LOS F during the PM
peak hour in the Fall months.
By the year 2035, traffic volumes along Carlsbad
Boulevard are anticipated to increase at a rate of 0.5% per year. The intersection analysis shows
that most of the study intersections will continue to
operate at an acceptable Level ff Service (D or better)
except for the intersection of Carlsbad Boulevard /
Island Way which will operate at an unacceptable Level of Service (LOS E).
MULTI-MODAL LEVEL OF SERVICE ANALYSIS
To evaluate the overall benefits to pedestrians, bicyclists and the transit users, an evaluation of level
of comfort and accessibility was conducted using
the city’s Multi-Modal Level of Service (MMLOS)
methodology. The methodology assigns points
based on a series of criteria established for each mode, which corresponds to a level of service of
a given segment. Existing pedestrian conditions
along the corridor vary widely, with unacceptable
LOS F pedestrian conditions on many segments.
This is primarily due to lack of sidewalk or basic ADA compliant features. The existing bicycle lanes along
the corridor resulted in acceptable bicycle scores
(LOS A). Improvements such as buffered bicycle
lanes, reduced lane widths and new sidewalks
improve the pedestrian and bicycle conditions to a point where all segments have acceptable walking
or bicycling conditions (LOS C or better) throughout
the one-mile project area.
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June 6, 2023 Item #2 17 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment10
IntroductIon & MethodologyIntroduction &
Methodology
STUDY SCENARIOS
GUIDING DOCUMENTS AND GUIDELINES
ANALYSIS APPROACH AND METHODOLOGY
June 6, 2023 Item #2 18 of 88
11
IntroductIon & Methodology
South Carlsbad Boulevard Coastal Project- Transportation Assessment
INTRODUCTION & METHODOLOGY
The South Carlsbad Coastline Project aims to improve
the performance, access, and safety for of all modes of
travel including vehicles, pedestrians, bicyclists, and transit riders along Carlsbad Boulevard from Manzano
Drive to La Costa Avenue. Exhibit 1 illustrates the
regional context of the project.
Through this project, the city is exploring ways to make South Carlsbad Boulevard more accessible to
the community. The city asked the public to share
their priorities for the entire 3-mile stretch including the
road itself and the public land that could be freed up if
the road were reconfigured, which was used to guide the development of the three options for the corridor.
These initial options were developed as part of a
grant-funded project by the California State Coastal
Conservancy. The grant is intended to demonstrate
how cities can move and adapt infrastructure based on the latest modeling of sea level rise. The three
roadway designs protect public infrastructure from
future sea level rise while also prioritizing walking and
biking paths.
The three options being considered at the time this
report was prepared include:
• Option 1: Four Lanes with Traffic Signals
• Option 2: Two Lanes with Roundabouts• Option 3: Two Lanes with Roundabouts and
Enhanced Pedestrian Crossing or Traffic Signal at
Solamar Drive
Exhibits 2 through 4 illustrate the options being
considered. All three options will change the
westernmost portion of the corridor to include improved
pedestrian and bicycle facilities. For all three options
the project includes the following improvements to pedestrian and bicycle infrastructure:
• 8-foot bike lanes with 20-foot multi-use path
• High-visibility crosswalks and ADA enhancements
• 10-foot pedestrian path and sidewalks
This Transportation Assessment evaluates the
benefits achieved for pedestrians and bicyclist in
addition to the resulting automobile operations,
access, comfort, and safety.
Photo 1 Carlsbad Boulevard (Southbound Lanes)
Photo 2 Carlsbad Boulevard (Northbound Lanes)
June 6, 2023 Item #2 19 of 88
CORONADO
DEL MAR
IMPERIAL
BEACH
SOLANA BEACH
SANTEE
EL CAJONLA MESA
LEMON GROVE
LA
MESAANNEX
CARLSBAD
CHULA VISTA
ENCINITAS S.D. COUNTY
SAN MARCOS
ESCONDIDO
SAN DIEGO
POWAY
NATIONAL CITY
OCEANSIDE
VISTA
PROJECT LOCATION
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
September 2022 Exhibit 1
Regional Project LocationRegional Context
Exhibit 1 Regional ContextJune 6, 2023 Item #2 20 of 88
-------
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NTS
Michael Baker
INTERNATIONAL
Exhibit 1 Regional Context
Option 1: 4-Lane Road with Traffic Signals
Exhibit 2 Option 1: 4-Lane Road with Traffic Signals
8'
1.5%
10'
PED
4'
TYPICAL20' WIDE CLASS 1
36'
2'VARR/W8'2'
1.5%
2'
TYPICAL TRAIL CROSS SECTIONN.T.S
8'8'10.5'3'4'10.5'3'8'5'12'
CLASS I PATH MEDIAN/BARRIER BIKE BUFF VEHICLE MED. VEHICLE BUFF BIKE SIDEWALK
2%2%
2'10'
SIDEWALK
R/W2'107'R/WVAR VAR10.5'
VEHICLE
10.5'
VEHICLE
2'8'8'8'3'10.5'4'10.5'3'8'6'2'LID BIKE BUFF VEHICLE MED.VEHICLE BUFF BIKE LID SIDEWALK
R/W
94'R/W VAR10.5'
VEHICLE
10.5'
VEHICLE
2%2%
TYPICAL ROADWAY CROSS SECTIONN.T.S
2%2%
2'8'8'8'3'10.5'4'10.5'3'8'6'2'LID BIKE BUFF VEHICLE MED.VEHICLE BUFF BIKE LID SIDEWALK
R/W
116'
R/W VAR12'
CLASS I PATH
10'
SIDEWALK
###
CARLSBAD BLVD RDWY RESILENCY PLANALTERNATIVE 1TRAFFIC SIGNAL ALTERNATIVE
11215903 FIG 1
PLANNORTH
0 400'200'
9370 Sky Park Court Suite 140San Diego, CA 92123 USAT 1 858 244 0440Wwww.ghd.com
Plot Date:Cad File No:31 January 2023 - 11:38 AM \\ghdnet\ghd\US\San Diego\Projects\561\11215903\Digital_Design\ACAD 2018\Figures\2022-06-28_Carlsbad Plan Exhibit_Traffic Signal Alternative.dwgPlotted by:Brittany Zambrano
Note:
1. GHD conceptual design developed from City of Carlsbad provided topography.Roadway design components will need to be modified in future phases of theproject to coincide with final surveyed topographic and parcel line information.
TYPICAL BRIDGE CROSS SECTIONN.T.S
Legend:
Proposed Class I Trail
Proposed Roadway
Coastal Hazard Zone
Proposed Bridge
Property Line
Landscape Areas
Proposed Pedestrian Pathway
North County Transit District RR
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Carlsbad Blvd
Oceanview Dr
Retain ExistingParking
"Complete Street" roadwaywith sidewalks and bike lanes
Las Encinas CreekRestoration Area
500' SpanBridge
Class 1 shared path for pedestrians,slower moving mobility optionsPedestrian Pathway
Coastal HazardZoneRetain ExistingParking
Retain ExistingParking
Coastal Access
Coastal Access
Avenida Encinas
Right of Way Limit withadjacent Class I and Sidewalk
Right of Way Limit withadjacent Class I and Sidewalk
June 6, 2023 Item #2 21 of 88
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2%2%
R/W
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8'8'10.5'3'4'10.5'3'8'5'12'CLASS I PATH MEDIAN/BARRIER BIKE BUFF VEHICLE MED. VEHICLE BUFF BIKE SIDEWALK
2%2%
2'10'SIDEWALK
R/W2'
86'R/WVAR VAR
8'
1.5%
10'
PED
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TYPICAL20' WIDE CLASS 1
36'
2'VARR/W8'2'
1.5%
2'
TYPICAL TRAIL CROSS SECTIONN.T.S
95'
2%2%
2'8'8'8'3'10.5'4'10.5'3'8'6'2'LID BIKE BUFF VEHICLE MED.VEHICLE BUFF BIKE LID SIDEWALK
R/WR/W VAR12'
CLASS I PATH
10'
SIDEWALK
TYPICAL BRIDGE CROSS SECTIONN.T.S
###
CARLSBAD BLVD RDWY RESILENCY PLANALTERNATIVE 2ROUNDABOUT ALTERNATIVE
11215903 FIG 1
PLANNORTH
0 400'200'
9370 Sky Park Court Suite 140San Diego, CA 92123 USAT 1 858 244 0440Wwww.ghd.com
Plot Date:Cad File No:31 January 2023 - 11:11 AM \\ghdnet\ghd\US\San Diego\Projects\561\11215903\Digital_Design\ACAD 2018\Figures\2022-06-28_Carlsbad Plan Exhibit_Roundabout Alternative.dwgPlotted by:Brittany Zambrano
Note:
1. GHD conceptual design developed from City of Carlsbad provided topography.Roadway design components will need to be modified in future phases of theproject to coincide with final surveyed topographic and parcel line information.
Legend:
Proposed Class I Trail
Proposed Roadway
Coastal Hazard Zone
Proposed Bridge
Property Line
Landscape Areas
Proposed Pedestrian Pathway
North County Transit District RR
Sol
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Carlsbad Blvd
Oceanview Dr
Retain ExistingParking
"Complete Street" roadwaywith sidewalks and bike lanes
Las Encinas CreekRestoration Area
500' SpanBridge
Class 1 shared path for pedestrians,slower moving mobility optionsPedestrian Pathway
Coastal HazardZoneRetain ExistingParking
Retain ExistingParking
Coastal Access
Coastal Access
Avenida Encinas
Right of Way Limit withadjacent Class I and Sidewalk
Right of Way Limit withadjacent Class I and Sidewalk
Option 2: 2-Lane Road with Roundabouts
Exhibit 3Option 2: 2-Lane Road with
Roundabouts
June 6, 2023 Item #2 22 of 88
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Exhibit 3Option 2: 2-Lane Road with
Roundabouts
Option 3: 2-Lane Road with Roundabouts and Enhanced Pedestrian Crossing
Exhibit 4 Option 3: 2-Lane Road with Roundabouts
and Enhanced Pedestrian Crossing
2'8'8'8'3'10.5'4'10.5'3'8'6'2'
TYPICAL ROADWAY CROSS SECTIONN.T.S
LID BIKE BUFF VEHICLE MED. VEHICLE BUFF BIKE LID SIDEWALK
2%2%
R/W73'R/W VAR
8'8'10.5'3'4'10.5'3'8'5'12'CLASS I PATH MEDIAN/BARRIER BIKE BUFF VEHICLE MED. VEHICLE BUFF BIKE SIDEWALK
2%2%
2'10'SIDEWALK
R/W2'86'R/WVAR VAR
8'
1.5%
10'
PED
4'
TYPICAL20' WIDE CLASS 1
36'
2'VARR/W8'2'
1.5%
2'
TYPICAL TRAIL CROSS SECTIONN.T.S
2%2%
2'8'8'8'3'10.5'4'10.5'3'8'6'2'LID BIKE BUFF VEHICLE MED. VEHICLE BUFF BIKE LID SIDEWALK
R/W95'R/W VAR12'CLASS I PATH10'SIDEWALK
TYPICAL BRIDGE CROSS SECTIONN.T.S
###
CARLSBAD BLVD RDWY RESILENCY PLANALTERNATIVE 3ROUNDABOUT HYBRID ALTERNATIVE
11215903 FIG 1
PLANNORTH
0 400'200'
9370 Sky Park Court Suite 140San Diego, CA 92123 USAT 1 858 244 0440Wwww.ghd.com
Plot Date:Cad File No:31 January 2023 - 10:45 AM \\ghdnet\ghd\US\San Diego\Projects\561\11215903\Digital_Design\ACAD 2018\Figures\2022-06-28_Carlsbad Plan Exhibit_Hybrid Alternative.dwgPlotted by:Brittany Zambrano
Legend:
Proposed Class I Trail
Proposed Roadway
Coastal Hazard Zone
Proposed Bridge
Property Line
Note:
1. GHD conceptual design developed from City of Carlsbadprovided topography. Roadway design components will needto be modified in future phases of the project to coincide withfinal surveyed topographic and parcel line information.
Landscape Areas
North County Transit District RR
Sol
a
m
a
r
D
r
Palom
a
r
A
i
r
p
o
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t
R
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a
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Carlsbad Blvd
Oceanview Dr
Retain ExistingParking
"Complete Street" roadwaywith sidewalks and bike lanes
Las Encinas CreekRestoration Area
500' SpanBridge
Class 1 shared use path for pedestrians,slower moving mobility optionsPedestrian Pathway
Coastal HazardZoneRetain ExistingParking
Proposed Pedestrian Pathway
Retain ExistingParking
Coastal Access
Coastal Access
Avenida Encinas
Right of Way Limit withadjacent Class I and Sidewalk
Right of Way Limit withadjacent Class I and Sidewalk
June 6, 2023 Item #2 23 of 88
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DAT[ INITIAL DAT[ INITI"L
OTHER Af'PROVAL CJTY APPROVAL
South Carlsbad Boulevard Coastal Project- Transportation Assessment16
IntroductIon & Methodology
STUDY AREA
Exhibit 5 illustrates the study area. While the
options focus on the 1-mile stretch from Manzano
Dive to Island Way, the analysis includes all seven intersections between Solamar Drive and La Costa
Avenue:
• Carlsbad Boulevard / Solamar Drive
• Carlsbad Boulevard / Island Way• Carlsbad Boulevard / Breakwater Road
• Carlsbad Boulevard / Poinsettia Lane
• Carlsbad Boulevard / Ponto Road
• Carlsbad Boulevard / Avenida Encinas
• Carlsbad Boulevard / La Costa Avenue
Traffic, pedestrian and bicycle data was collected
in August (summer) and October (fall) 2022 for
these locations. In addition, a field investigation and
observations were conducted to document the existing physical conditions, which were used in this analysis.
STUDY SCENARIOS
To understand the changes in traffic flow and
operations, the intersections within the study area
were analyzed for the following scenarios:
Existing Conditions - Analysis of existing conditions
of the roadway based on existing traffic counts, lane
geometry, and intersection control. Existing volumes
were captured in the summer and fall.
Future Year 2035 Baseline Conditions - This
scenario analyzes the future year 2035 conditions, the
lane geometry, and traffic control.
Future Year 2035 Build Conditions - This scenario
analyzes the future year 2035 conditions with the
options developed for the South Carlsbad Boulevard
Project. Future year traffic volumes are based on the
ABM 2.0+ from the Regional Plan & Sustainable Communities Strategy adopted by the SANDAG
Board of Directors.
Photo 3 Ponto Beach Parking
Photo 4 Carlsbad Boulevard (Southbound Lanes)
Photo 5 Carlsbad Blvd & Avenida Encinas
June 6, 2023 Item #2 24 of 88
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
September 2022
5
Breakwater Road
1
2
5
6
3
4
7
5
Ai
Exhibit 1
Project Study Area
Initial 1-Mile Section
Legend
Study Intersection#
Study Area
Exhibit 5 Study Area
Photo 3 Ponto Beach Parking
Photo 4 Carlsbad Boulevard (Southbound Lanes)
Photo 5 Carlsbad Blvd & Avenida Encinas
June 6, 2023 Item #2 25 of 88
■ •
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Michael Baker
INTERNATIONAL
South Carlsbad Boulevard Coastal Project- Transportation Assessment18
IntroductIon & Methodology
Exhibit 6 General Plan - Mobility Element Street System
GUIDING DOCUMENTS &
GUIDELINES
GENERAL PLAN
In 2015, the city adopted an update to the General
Plan, which included updates to the Circulation
Element (now referred to as a Mobility Element). The
Mobility Element identifies roadway typologies that
describe the functional use and the primary users of facilities. In turn, the concept of a multimodal level
of service was included in the Mobility Element that
established goals, metrics and requirements for
analyzing pedestrian facilities, bicycle facilities, transit
facilities and roadways.
Mode MMLOS
Required Purpose & Design
• Primary purpose of coastal streets is to move people along the city’s ocean waterfront and connect people to the beach, recreation, businesses
and residences in close proximity to the waterfront.
• Designed to safely move all modes of travel while enhancing mobility for
pedestrians and bicyclists.
• Vehicle speeds shall be managed to support uses along the coast.
• Enhanced bicycle and pedestrian facilities (high visibility crosswalks,
enhanced pedestrian notifications, etc.)
• Pedestrian facilities should be a minimum of five feet and strive for six to
eight feet.
• Pedestrian crossings should be minimized.
• Trail facilities should be encouraged.
• Opportunities for mid-block crossings should be investigated.
• Transit facilities and operation improvements should be encouraged.
Carlsbad Boulevard is identified as a Coastal Street
in the Mobility Element (Exhibit 6). The primary
purpose of a Coastal Street is to move people along
the city’s ocean waterfront and connect people to the beach, recreation, businesses and residences in
close proximity to the waterfront. The street serves as
a destination for people who seek to drive, walk and
bicycle along the ocean waterfront. Coastal Streets are
subject to pedestrian and bicycle Multi-Modal Level of Service (MMLOS) standards (Table 1).
Vehicle operating conditions are evaluated based
on Level of Service in this Traffic Assessment. Level
of Service (LOS) is based on the average delay experienced by vehicles at the intersection. This
information serves as a guide to understanding
potential operational or safety issues that could be
addressed through intersection control or geometric
changes at the intersection.
Table 1. Coastal Street MMLOS Criteria
June 6, 2023 Item #2 26 of 88
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19
IntroductIon & Methodology
South Carlsbad Boulevard Coastal Project- Transportation Assessment
3-17
OCEANSIDE
SAN MARCOS
ENCINITAS
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City of Vista
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MCCLELLAN-PALOMARAIRPORT
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MaerkleReservoir
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City of Oceanside
Highways
Railroad
Transit Centers
Half Mile Radius
City Limits
0 1 20.5
Miles
Source: City of Carlsbad, 2013; SANDAG, 2013; Fehr & Peers, 2013; Dyett & Bhatia, 2013.
Freeway
Arterial Streets
Identity Streets
Village Streets
Arterial Connector Streets
Neighborhood Connector Streets
Coastal Streets
School Streets
Employment/Transit Connector Streets
Industrial Streets
Local/Neighborhood Street
Figure 3-1
Street System Map
GENERAL PLAN
500 ACRES
100ACRES
Planned Arterial Streets
Planned Arterial Connector Streets
Planned Local/Neighborhood Streets
Figure 3-1: Street System
Exhibit 6 General Plan - Mobility Element Street System
June 6, 2023 Item #2 27 of 88
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South Carlsbad Boulevard Coastal Project- Transportation Assessment20
IntroductIon & Methodology
Level of Service
Signalized Intersection Delay (Seconds)
Unsignalized Intersection & Roundabout Delay (Seconds)Description
A <10 <10 Operations with very low delay and most
vehicles do not stop.
B >10 and <20 >10 and <15 Operations with good progression but with
some restricted movements.
C >20 and <35 >15 and <25 Operations where a significant number of vehicles are stopping with some backup
and light congestion
D >35 and <55 >25 and <35
Operations where congestion is noticeable,
longer delays occur, and manyvehicles stop. The proportion of vehicles not stopping declines.
E >55 and <80 >35 and <50 Operations where there is significant delay, extensive queuing, and poor
progression.
F >80 >50
Operations that are unacceptable to most
drivers, when the arrival rates exceed
the capacity of the intersection.
Table 2. Intersection LOS Description and Thresholds
Source: Highway Capacity Manual, 6th Edition (HCM6)
ANALYSIS APPROACH & METHODOLOGY
INTERSECTION ANALYSIS METHODOLOGY
Level of service (LOS) is commonly used as a qualitative description of intersection operation. Consistent
with the city’s guidelines, the intersection analysis conforms to the operational analysis methodology outlined the Highway Capacity Manual (HCM) 6th Edition and performed utilizing the Synchro 11 signals and Sidra 9
roundabouts traffic analysis software. The HCM analysis methodology describes the operation of an intersection
using a range of level of service from LOS A (free-flow conditions) to LOS F (severely congested conditions),
based on the corresponding stopped delay, in terms of seconds per vehicle (sec/veh). The criteria for the LOS
grade designations are provided in Table 2.
Synchro reports average delay for a signalized intersection, which correspond to a particular LOS, to describe
the overall operation of an intersection. Unsignalized intersection LOS for all-way stops is based on the average
delay for all approaches. Delay for one-way or two-way stop-controlled intersections is based on available gaps
in traffic flow on the non-controlled approach and LOS is based on the approach with the worst delay. Sidra reports average approach delays to determine LOS for roundabouts.
Table 3. MMLOS Thresholds
June 6, 2023 Item #2 28 of 88
21
IntroductIon & Methodology
South Carlsbad Boulevard Coastal Project- Transportation Assessment
MULTIMODAL LEVEL OF SERVICE
METHODOLOGY
The MMLOS analysis is based on the methodology
worksheets provided by the city, which is consistent with the goals and policies outlined in the General
Plan Mobility Element. Points are assigned based on
a series of criteria established for each travel mode,
which translates to a corresponding level of service.
Table 3 summarizes the points range for each level of service. Tables 4 and 5 illustrate pedestrian,
bicycle, and transit criteria, respectively. As shown
in the following tables, points are assigned based
on existing facilities, traffic volume, traffic speeds
and other characteristics of the roadway that would influence the traveling experience. Pedestrian, bicycle
and transit LOS are not a function of the volume of
pedestrian activity, bicycle activity or transit ridership.
Point Score LOS Standard
90-100 A
Acceptable80-89 B
70-79 C
60-69 D
50-59 E Deficient0-49 F
Table 3. MMLOS Thresholds
Source: Carlsbad TIA Guidelines, 2022.
Note: Point scores are tabulated irrespective of the type of mode (transit, bicycle, or pedestrian).
Carlsbad Boulevard is subject to a Pedestrian and
Bicycle LOS analysis. A pedestrian LOS analysis
evaluates the quality of the pedestrian system (e.g.
number of vehicle lanes that need to be crossed and speed of adjacent traffic) and friendliness of
the infrastructure at intersections (e.g. pedestrian
countdown heads, curb extensions, etc.) Bicycle LOS
evaluates the quality as well (e.g. bicycle facility type),
the amenities of the system (e.g. bicycle parking), and the friendliness of the infrastructure (e.g. bicycle
detection at intersections, pavement conditions).
June 6, 2023 Item #2 29 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment22
IntroductIon & Methodology
Table 4. Pedestrian MMLOS Criteria
Criteria Points
Accessibility &
Functionality
* Essential Features (Criteria must be met): Sidewalk or path meets Americans with
Disabilities Act (ADA) unobstructed width requirements 15
* Essential Features (Criteria must be met): Sidewalk width meets minimum width for
typology according to the Mobility Element (or 5’ if unspecified)10
Sidewalk width exceeds minimum width for typology according to the Mobility Element (or 6’ if unspecified)5
* Essential Features (Criteria must be met): Ramps and landings within segment meet ADA requirements 10
* Essential Features (Criteria must be met): Sidewalk segments meet ADA requirements
(cross-slope and trip hazards)10
Sidewalk width meets recommended width for typology according to the Mobility Element
(or 8’ if unspecified)10
Street Characteristics
3 lanes or less to be crossed without pedestrian refuge 10
On-street parking or bike lane provides 6’ or more buffer between pedestrians and
vehicle travel way 5
Landscaping 2’ to 5’ wide provides ‘buffer’ between pedestrians and vehicle travel way 5
Landscaping greater than 5’ wide provides ‘buffer’ between pedestrians and vehicle
travel way 10
Less than 3,000 vehicles per lane per day 5
Speed limit 30 mph or less 5
No apparent sight distance issues at intersections and pedestrian crossings 5
Permanent speed control devices installed on segments posted as approved by the City Traffic Engineer 5
Crossing
Characteristics
* Essential Features (Criteria must be met): Crosswalks are marked according to the Manual on Uniform Traffic Control Devices, California Edition (MUTCD-CA) guidelines 10
Crosswalk is high visibility (i.e., continental markings per the MUTCD-CA)5
Traffic calming measures that reduce crossing width (pedestrian refuge, bulbouts,
chokers, right-turn median island)10
Presence of intersection enhancements for pedestrians (pedestrian-friendly signal phasing, pedestrian countdown heads, signage, etc.)10
RRFBs at uncontrolled crossings if warranted 5
Other Elements
* Essential Features (Criteria must be met): Street light locations appear adequate 10
Active building frontages on 80% of street curbline (pedestrian attracting frontages such as active storefronts and recreational spaces)5
Street trees provide shade over more than 50% of sidewalk length 5
Street furniture oriented toward businesses or attractions 5
Pedestrian scale lighting 5
Source: City of Carlsbad, MMLOS Tool
Table 5. Bicycle MMLOS Criteria
June 6, 2023 Item #2 30 of 88
23
IntroductIon & Methodology
South Carlsbad Boulevard Coastal Project- Transportation Assessment
CriteriaPoints
Accessibility &
Functionality
* Essential Features (Criteria must be met): Sidewalk or path meets Americans with
Disabilities Act (ADA) unobstructed width requirements15
* Essential Features (Criteria must be met): Sidewalk width meets minimum width for
typology according to the Mobility Element (or 5’ if unspecified)10
Sidewalk width exceeds minimum width for typology according to the Mobility Element (or 6’ if unspecified)5
* Essential Features (Criteria must be met): Ramps and landings within segment meet ADA requirements10
* Essential Features (Criteria must be met): Sidewalk segments meet ADA requirements
(cross-slope and trip hazards)10
Sidewalk width meets recommended width for typology according to the Mobility Element
(or 8’ if unspecified)10
Street Characteristics
3 lanes or less to be crossed without pedestrian refuge10
On-street parking or bike lane provides 6’ or more buffer between pedestrians and
vehicle travel way5
Landscaping 2’ to 5’ wide provides ‘buffer’ between pedestrians and vehicle travel way5
Landscaping greater than 5’ wide provides ‘buffer’ between pedestrians and vehicle
travel way10
Less than 3,000 vehicles per lane per day5
Speed limit 30 mph or less5
No apparent sight distance issues at intersections and pedestrian crossings5
Permanent speed control devices installed on segments posted as approved by the City Traffic Engineer5
Crossing
Characteristics
* Essential Features (Criteria must be met): Crosswalks are marked according to the Manual on Uniform Traffic Control Devices, California Edition (MUTCD-CA) guidelines10
Crosswalk is high visibility (i.e., continental markings per the MUTCD-CA)5
Traffic calming measures that reduce crossing width (pedestrian refuge, bulbouts,
chokers, right-turn median island)10
Presence of intersection enhancements for pedestrians (pedestrian-friendly signal phasing, pedestrian countdown heads, signage, etc.)10
RRFBs at uncontrolled crossings if warranted5
Other Elements
* Essential Features (Criteria must be met): Street light locations appear adequate10
Active building frontages on 80% of street curbline (pedestrian attracting frontages such as active storefronts and recreational spaces)5
Street trees provide shade over more than 50% of sidewalk length5
Street furniture oriented toward businesses or attractions5
Pedestrian scale lighting5
Table 5. Bicycle MMLOS Criteria
Criteria Points
Street Characteristics
Speed limit is ≤ 25 mph 25
Speed limit is 30 mph 15
Speed limit is 35 mph 10
Residential street with ADT < 3,000 15
Street with Average Daly Traffic (ADT) between 3,000 and 6,000 vehicles per day (vpd)10
Facility
Class I facility (off-street path), Class IV (cycle track), or multiuse path 25
Class II facility that meets minimum width of 5’ (on-street bicycle lanes)15
Bike lane buffer (2’ min) is provided 5
Class III facility (bike route designated by signage or paint only)5
Additional traffic calming/speed management features have been applied to Class III facility (i.e. a bike boulevard)10
Bikeway Design
Bikeway meets or exceeds the Bicycle Master Plan 25
Bike lane (including buffer) is at least 8’ wide from face of curb 10
Bicycle facilities with signing and striping meet design guidelines D 10
Good pavement condition for bikeway (no visible potholes)10
Free of infrastructure that obstructs bike facility (e.g. grates)5
Connectivity/Contiguity
Bikeways on side streets are consistent with Bicycle Master Plan along segment 5
Bike lanes are striped continuously on all approaches to and departures from intersections, without dropping at turn lanes or driveways 5
Adjacent Vehicle
Parking
No on-street parking and speed limit is 25 or 30 mph 5
Back-in angled parking 5
Parallel parking with door-side buffered bike lane 5
Other Elements Enhanced bicycle detection or video detection is provided at intersections 5
Bicycle racks are provided along segment 5
Source: City of Carlsbad, MMLOS Tool
June 6, 2023 Item #2 31 of 88
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--------------t• ................................................................................................................................................ .
South Carlsbad Boulevard Coastal Project- Transportation Assessment24
Existing Conditions
Existing Conditions
INTERSECTION GEOMETRICS
PEDESTRIAN FACILITIES
BICYCLE FACILITIES
LOCAL & REGIONAL TRANSIT SERVICES
June 6, 2023 Item #2 32 of 88
25
Existing Conditions
South Carlsbad Boulevard Coastal Project- Transportation Assessment
EXISTING FACILITIES
This chapter of the Transportation Assessment
describes the conditions of the existing roadway
network within the Project study area.
INTERSECTION GEOMETRICS
Carlsbad Boulevard is a heavily used transportation
route for coastal recreation, coastal view access, and
general north/south commuting. Exhibit 7 illustrates the existing roadway geometrics and intersection
configurations. The posted speed limit on South
Carlsbad Boulevard is 50 miles per hour (mph) from
Manzano Drive to La Costa Avenue in both directions.
PEDESTRIAN FACILITIES
There are no sidewalks on either side of Carlsbad Boulevard from Manzano Drive to Breakwater Road.
Starting at Breakwater Road, a non-continuous
sidewalk is provided on the east side of the road and
ends just south of Poinsettia Lane. Existing pedestrian
facilities are illustrated in Exhibit 8. The following provides a more detailed list of pedestrian facilities at
the seven study intersections. A detailed pedestrian
MMLOS analysis is provided in Section 5 of this report.
Intersection 1. Carlsbad Boulevard & Solamar Drive - Marked crosswalks with pedestrian signal
heads are provided on the east and south legs of this
T-intersection. Curb ramps are provided on the north-
east, south-east, and south-west corners; however,
truncated domes are provided on the south-west corner only.
Intersection 2. Carlsbad Boulevard & Island
Way - This unique intersection has a wide landscape
median that separates the northbound travel lanes and the southbound travel lanes and the intersection
effectively operates as two adjacent signalized
intersections. Marked crosswalks and pedestrian
signal heads are provided on the north leg only.
However, the curb ramps do not appear to be ADA compliant. Pedestrians are prohibited from crossing
on all other legs.
Intersection 3. Carlsbad Boulevard &
Breakwater Road - Marked crosswalks with
pedestrian signal heads are provided on the north
and east legs of the intersection. Curb ramps are provided on the north-east and south-east corners;
however, they do not appear to be ADA compliant.
Intersection 4. Carlsbad Boulevard &
Poinsettia Lane - Marked crosswalks with pedestrian signal heads are provided on the south,
east, and west legs of the intersection. Curb ramps
are provided on all corners of the intersection;
however, they do not appear to be ADA compliant.
Intersection 5. Carlsbad Boulevard & Ponto Road - Marked crosswalks with pedestrian signal
heads are provided on the north and east legs of this
T-intersection. Curb ramps are provided; however
they are not ADA compliant.
Intersection 6. Carlsbad Boulevard & Avenida
Encinas - Like the intersection at Island Way, this
unique intersection has a wide landscaped median
that separates the northbound and southbound travel lanes and effectively operates as two adjacent
signals. Marked crosswalks and pedestrian signal
heads are provided on the north, south, and east legs
of the intersection. The curb ramps do not appear to
be ADA compliant.
Intersection 7. Carlsbad Boulevard & La Costa
Avenue - Marked crosswalks with pedestrian signal
heads are provided on the south and west legs of
the intersection. Curb ramps are provided on the north-west, south-west, and south-east corners.
Pedestrians are prohibited from crossing on all other
legs.
June 6, 2023 Item #2 33 of 88
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
September 2022
5 6
#1 2
3 4
7
Island WaySolomar Drive
Avenida Encinas
Breakwater Road Poinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
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3
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7
5
P Ai
Initial 1-Mile Section
Study Intersection
Signalized Intersection
#
Exhibit 7
Existing Intersection Lane Configurations
Through Lane
Turn Lane
Shared Lane
U-Turn Only
Existing Intersection Lane Configuration
Exhibit 7 Existing Intersection
Lane ConfigurationJune 6, 2023 Item #2 34 of 88
{.D
NTS
Michael Baker
INTERNATIONAL
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Lane Configuration
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September 2022
5
Breakwater Road
5
Ai
Exhibit 5
Existing Pedestrian Facilities
Initial 1-Mile Section
Existing Crosswalk
Existing Sidewalk
Legend
Existing Pedestrian Facilities
Exhibit 8 Existing Pedestrian Facilities
June 6, 2023 Item #2 35 of 88
■
1111
~
NTS
Michael Baker
INTERNATIONAL
South Carlsbad Boulevard Coastal Project- Transportation Assessment28
Existing Conditions
BICYCLE FACILITIES
Carlsbad Boulevard is a Coastal Road and is subject
to a bicycle MMLOS analysis which is provided in
Section 5 of this report. Class II bicycle lanes are
provided along the northbound and southbound
lanes on Carlsbad Boulevard. A Class III bike route is provided at the ramp on Palomar Airport Road
which enters and exits Carlsbad Boulevard. Exhibit
9 illustrates the existing bicycle facilities within the
project study area.
LOCAL & REGIONAL TRANSIT
SERVICE
North County Transit District (NCTD) provides bus
service within the study area. NCTD Route 101 is a
Coaster Connection Route, providing daily service from Westfield UTC to the Oceanside Transit Center
with service along Carlsbad Boulevard. Service is
provided Monday through Friday from 5:28 AM to
10:50 PM and on weekends (Saturday & Sunday)
from 5:48 AM to 11:12 PM.
Within the study area there are a total of seven bus
stops in the northbound and southbound direction. The
COASTER rail line also provides service adjacent to
the study area. Carlsbad Poinsettia Station is located just east of Carlsbad Boulevard and has pedestrian
facilities connecting the transit station to Carlsbad
Boulevard.
Existing transit routes and existing stops are illustrated in Exhibit 10. Carlsbad Boulevard is a Coastal Street
and is not subject to a transit MMLOS analysis. The
project will provide improved access to these stops
and opportunities to provide enhanced features at the
stops.
Photo 6 Class II Bike Lane at Carlsbad Blvd & La Costa Ave
Photo 7 Existing Bus Stop at Carlsbad Blvd & Avenida Encinas
June 6, 2023 Item #2 36 of 88
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
September 2022
5
Breakwater Road
5
Ai
Exhibit 9
Existing Bicycle Facilities
Initial 1-Mile Section
Class II Bike Lane
Class III “Sharrows” Bike Route
Legend
Existing Bicycle Facilities
Exhibit 9 Existing Bicycle Facilities
Photo 6 Class II Bike Lane at Carlsbad Blvd & La Costa Ave
Photo 7 Existing Bus Stop at Carlsbad Blvd & Avenida Encinas
June 6, 2023 Item #2 37 of 88
■
~
NTS
Michael Baker
INTERNATIONAL
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
September 2022
5
Breakwater Road
5
Ai
Exhibit 10
Existing Transit Facilities
Initial 1-Mile Section
Existing Bus Route
Existing COASTER Route
Bus Stop
COASTER Station
Legend
CARLSBAD POINSETTIA STATION
Existing Transit Facilities
Exhibit 10 Existing Transit Facilities
June 6, 2023 Item #2 38 of 88
■
~
NTS
Michael Baker
INTERNATIONAL
Exhibit 10 Existing Transit Facilities
This page is intentionally left blank
June 6, 2023 Item #2 39 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment32
Vehicle Traffic analysis
TRAFFIC VOLUMES
BASELINE INTERSECTION ANALYSIS
PROPOSED PROJECT IMPROVEMENTS INTERSECTION ANALYSISQUEUING ASSESSMENT
ALTERNATIVE CONSIDERATIONS
Vehicle Traffic
Analysis
June 6, 2023 Item #2 40 of 88
33
Vehicle Traffic analysis
South Carlsbad Boulevard Coastal Project- Transportation Assessment
TRAFFIC VOLUMES
EXISTING CONDITIONS
To determine the existing operating conditions of the
study intersections, peak hour intersection movement counts were collected in August (summer) and
October (fall) 2022. Data was collected for a typical
weekday and a typical weekend for both summer
and fall. Typical weekday data was collected for the
morning (AM) peak period between the hours of 7:00 AM to 9:00 AM and evening (PM) peak period from
4:00 PM to 6:00 PM. For the typical weekend, midday
peak period counts were collected between the hours
of 11:00 AM to 1:00 PM. The traffic volumes used in
this analysis represent the highest hour within the peak periods counted for each intersection. Detailed
count data is contained in Appendix A.
Exhibit 11 and 12 show the summer conditions weekday peak hour volumes and existing weekend
midday peak hour volumes, respectively. Exhibit 13
and 14 show the existing fall conditions weekday
peak hour volumes and existing weekend midday
peak hour volumes, respectively. Detailed count data is contained in Appendix A.
FUTURE CONDITIONS
In order to derive future year 2035 baseline traffic
volumes, the SANDAG Activity Based Model (ABM)
2+/2021 Regional Plan (RP) was used to reflect the City
of Carlsbad Housing Element Update assumptions.
Year 2016 and year 2035 volumes produced by the model were used to calculate a growth rate for the
corridor. The forecast growth rate of 0.5% per year
which was applied to existing traffic volumes for each
study intersection along the corridor. These volumes
were compared to other studies and reports prepared for projects along the corridor to ensure consistency
with historic trends.
Future Year 2035 traffic volumes calculated for
the corridor and used to evaluate future operating conditions are provided in Exhibit 15 (summer
weekday), Exhibit 16 (summer weekend midday),
Exhibit 17 (fall weekday AM/PM), and Exhibit 18 (fall
weekend midday). Detailed model data and growth
rate calculations are contained in Appendix B.
June 6, 2023 Item #2 41 of 88
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solamar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Study Intersection #
AM / PM Peak Hour Volumes ## / ##
Average Daily Traffic Volumes #,###
Exhibit 8
Existing Summer Weekday AM / PM Peak Hour Volumes &
Average Daily Traffic Volumes
34 / 45 9 / 17
17 / 11 15 / 17
2 / 2 9 / 15
5 / 7 29 / 28 6 / 9
4 / 10 6 / 11 3 / 8
126 / 242 21 / 11 252 / 264
41 / 27 7 / 915 / 17
106 / 134
6 / 10 30 / 13
42 / 46 19 / 15
130 / 230 140 / 168 22 / 14
10 / 10
106 / 134
Exhibit 11 Existing
Summer Weekday Am/
PM Peak Hour Volumes
& Average Daily Traffic Volumes
Existing Summer Weekday AM/PM Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #242 of 88
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\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solamar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Study Intersection #
Weekend Mid-Day Volumes ##
Average Daily Traffic Volumes #,###
Exhibit 9
Existing Summer Weekend Mid-day Peak Hour Volumes &
Average Daily Traffic Volumes
4921
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51118
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199
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134
Exhibit 12
Existing Summer
Weekend Midday
Peak Hour Volumes & Average Daily Traffic Volumes
Existing Summer Weekend Mid-Day Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #243 of 88
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\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solamar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
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1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Exhibit 8
Existing Non-Summer Weekday AM / PM Peak Hour Volumes &
Average Daily Traffic Volumes
42 / 31 15 / 13
10 / 11 10 /26
2 / 3 18 / 12
5 / 11 18 / 14 10 / 4
3 / 6 6 / 20 5 / 10
96 / 337 19 / 14 251 / 220
18 / 21 4 / 910 / 26
89 / 87
14 / 10 15 / 16
58 / 59 12 / 2
117 / 242 170 / 138 25 / 12
6 / 9
89 / 87
Study Intersection #
Weekend Mid-Day Volumes ##
Average Daily Traffic Volumes #,###
Exhibit 13
Existing Fall
Weekday AM/
PM Peak Hour Volumes & Average Daily Traffic Volumes
Existing Fall Weekday AM/PM Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #244 of 88
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Exhibit 13
Existing Fall
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\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solamar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
4417
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Exhibit 9
Existing Non-Summer Weekend Mid-day Peak Hour Volumes &
Average Daily Traffic Volumes
1020
Study Intersection #
Weekend Mid-Day Volumes ##
Average Daily Traffic Volumes #,###
Existing Fall Weekend Mid-Day Peak Hour Volumes &
Average Daily Traffic Volumes
Exhibit 14
Existing Fall
Weekend
Midday Peak Hour Volumes & Average Daily Traffic Volumes
June 6, 2023Item #245 of 88
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\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solomar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Exhibit 10
Future Summer Weekday AM / PM Peak Hour Volumes &
Average Daily Traffic Volumes
36 / 48 10 / 18
18 / 12 16 / 18
2 / 2 10 / 16
5 / 7 31 / 30 6 / 10
4 / 11 6 / 12 3 / 9
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45 / 49 20 / 16
139 / 245 149 / 179 23 / 15
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113 / 143
Study Intersection #
Weekend Mid-Day Volumes ##
Average Daily Traffic Volumes #,###
Exhibit 15
Future Summer
Weekday AM/
PM Peak Hour Volumes & Average Daily Traffic Volumes
Future Summer Weekday AM/PM Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #246 of 88
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Future Summer
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PM Peak Hour Volumes & Average Daily Traffic Volumes
\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solomar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Exhibit 11
Future Summer Weekend Mid-day Peak Hour Volumes &
Average Daily Traffic Volumes
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Weekend Mid-Day Volumes ##
Average Daily Traffic Volumes #,###
Exhibit 16
Future Summer
Weekend Midday Peak Hour Volumes & Average Daily Traffic Volumes
Future Summer Weekend Mid-Day Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #247 of 88
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\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solomar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Exhibit xx
45 / 33 16 / 14
11 / 12 11 /28
2 / 3 19 / 13
5 / 12 19 / 15 11 / 4
3 / 6 6 / 21 5 / 6
102 / 360 20 / 15 268 / 235
19 / 22 4 / 1011 / 28
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Study Intersection #
Weekend Mid-Day Volumes ##
Average Daily Traffic Volumes #,###
Future Non-Summer Weekday AM / PM Peak Hour Volumes &
Average Daily Traffic Volumes
Exhibit 17
Future Fall Weekday
AM/PM Peak Hour
Volumes & Average Daily Traffic Volumes
Future Fall Weekday AM/PM Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #248 of 88
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\\CARLCA1FS1.bkr.mbakercorp.com\HROOT\PDATA\191302 South Carlsbad Blvd TA\Traffic\Exhibits\PDF's
November 2022
56
#12
34
7
Island Way Solomar Drive
Avenida Encinas
Breakwater RoadPoinsettia Lane
Ponto Road
La Costa Ave
5
Breakwater Road
1
2
5
6
3
4
7
5
PAi
Initial 1-Mile Section
Exhibit xx
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Exhibit 18
Future Fall
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Future Fall Weekend Mid-Day Peak Hour Volumes &
Average Daily Traffic Volumes
June 6, 2023Item #249 of 88
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South Carlsbad Boulevard Coastal Project- Transportation Assessment42
Vehicle Traffic analysis
BASELINE INTERSECTION
ANALYSIS
In order to determine the baseline intersection
operating conditions, existing and future volumes were evaluated with the current, existing geometric
configurations and traffic controls.
Table 6. Existing Intersection LOS Summary - Summer Weekday
Study Intersection Traffic Control
Existing Baseline Conditions(Summer Weekday)
AM PM
Delay1 - LOS Delay
1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 7.6 - A 7.5 - A
2 - Carlsbad Blvd / Island Way Signal 21.7 - C 39.4 - D
3 - Carlsbad Blvd / Breakwater Rd Signal 5.5 - A 4.0 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 10.4 - B 8.6 - A
5 - Carlsbad Blvd / Ponto Rd Signal 9.0 - A 7.5 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 7.0 - A 7.5 - A
7 - Carlsbad Blvd / La Costa Ave Signal 20.0 - B 29.4 - C
Table 7. Existing Intersection LOS Summary - Summer Weekend
EXISTING SUMMER OPERATIONS
Table 6 presents the existing weekday summer
conditions peak hour operational analysis and Table
7 presents the summer weekend conditions. Exhibit
19 summarizes the LOS results for existing summer
conditions. Detailed analysis worksheets are provided in Appendix C. As shown, intersections along the
corridor operate at LOS D or better during the summer.
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
Study Intersection Traffic Control
Existing Baseline Conditions(Summer Weekend)
Midday
Delay1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 8.4 - A
2 - Carlsbad Blvd / Island Way Signal 29.8 - C
3 - Carlsbad Blvd / Breakwater Rd Signal 4.6 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 10.8 - B
5 - Carlsbad Blvd / Ponto Rd Signal 7.6 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 8.2 - A
7 - Carlsbad Blvd / La Costa Ave Signal 28.6 - B
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
June 6, 2023 Item #2 50 of 88
Table 6. Existing Intersection LOS Summary - Summer Weekday
Table 7. Existing Intersection LOS Summary - Summer Weekend
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Exhibit XX
Existing Summer Level of Service Summary
AA
A
CD
C
AA
A
BA
B
AA
A
AA
A
BC
B
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
Exhibit 19
Existing Summer
Level of Service
Summary
Existing Summer Level of Service Summary
June 6, 2023 Item #2 51 of 88
~
NTS
Michael Baker
South Carlsbad Boulevard Coastal Project- Transportation Assessment44
Vehicle Traffic analysis
EXISTING FALL OPERATIONS
Table 8 presents the existing weekday fall conditions
peak hour operational analysis and Table 9 presents
the existing weekend fall conditions. Exhibit
20 summarizes the LOS results for existing fall
conditions. Detailed analysis worksheets are provided in Appendix C.
Table 8. Existing Intersection LOS Summary - Fall Weekday
Study Intersection Traffic Control
Existing Baseline Conditions(Fall Weekday)
AM PM
Delay1 - LOS Delay
1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 6.0 - A 7.7 - A
2 - Carlsbad Blvd / Island Way Signal 16.2 - B 103.7 - F
3 - Carlsbad Blvd / Breakwater Rd Signal 4.6 - A 5.5 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 11.0 - B 11.4 - B
5 - Carlsbad Blvd / Ponto Rd Signal 10.0 - A 9.4 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 7.8 - A 7.1 - A
7 - Carlsbad Blvd / La Costa Ave Signal 18.5 - B 42.8 - D
Table 9. Existing Intersection LOS Summary - Fall Weekend
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
As shown, intersections along the corridor operate
at LOS D or better during the fall with the exception
of Carlsbad Boulevard at Island Way which operates
at LOS F during weekday PM conditions. At this intersection the north and south approaches are
physically separated by approximately 50-feet.
Pedestrians cross a total of 140-feet when crossing
Carlsbad Boulevard north and south, which requires
42 seconds pedestrian walk time. As a result, vehicles on Carlsbad Boulevard north and south must wait for
the pedestrian signal to end before getting a green
light. This results in an average vehicle delay of 103.7
seconds when the pedestrian crossing is activated
(LOS F).
Study Intersection Traffic Control
Existing Baseline Conditions(Fall Weekend)
Midday
Delay1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 6.6 - A
2 - Carlsbad Blvd / Island Way Signal 21.8 - C
3 - Carlsbad Blvd / Breakwater Rd Signal 3.9 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 9.9 - A
5 - Carlsbad Blvd / Ponto Rd Signal 7.8 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 7.5 - A
7 - Carlsbad Blvd / La Costa Ave Signal 19.3 - B
June 6, 2023 Item #2 52 of 88
Table 8. Existing Intersection LOS Summary - Fall Weekday
Table 9. Existing Intersection LOS Summary - Fall Weekend
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Exhibit XX
Existing Fall Level of Service Summary
AA
A
BF
C
AA
A
BB
A
AA
A
AA
A
BD
B
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
Exhibit 20
Existing Fall
Level of Service
Summary
Existing Fall Level of Service Summary
June 6, 2023 Item #2 53 of 88
~
NTS
Michael Baker
South Carlsbad Boulevard Coastal Project- Transportation Assessment46
Vehicle Traffic analysis
FUTURE YEAR 2035 SUMMER
OPERATIONS
Table 10 presents the Future Year 2035 summer
conditions weekday peak hour operational analysis and Table 11 presents the Future Year 2035 summer
conditions weekend peak hour operational analysis.
Exhibit 21 summarizes the LOS results for future
summer conditions. Detailed analysis worksheets are
provided in Appendix D.
Table 10. Future Year 2035 Intersection LOS Summary - Summer Weekday
Study Intersection Traffic Control
Future Year 2035 Baseline Conditions(Summer Weekday)AM PM
Delay1 - LOS Delay
1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 7.7 - A 7.6 - A
2 - Carlsbad Blvd / Island Way Signal 22.7 - C 52.7 - D
3 - Carlsbad Blvd / Breakwater Rd Signal 5.4 - A 4.6 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 12.2- B 8.7 - A
5 - Carlsbad Blvd / Ponto Rd Signal 9.1 - A 7.6 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 7.5 - A 7.8 - A
7 - Carlsbad Blvd / La Costa Ave Signal 22.2 - C 33.6 - C
Table 11. Future Year 2035 Intersection LOS Summary - Summer Weekend
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
As shown, intersections along the corridor are forecast
to operate at LOS D or better during the summer by
year 2035.
Study Intersection Traffic Control
Future Year 2035 Baseline Conditions (Summer Weekend)Midday
Delay1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 8.5 - A
2 - Carlsbad Blvd / Island Way Signal 35.9 - D
3 - Carlsbad Blvd / Breakwater Rd Signal 5.2 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 15.2 - B
5 - Carlsbad Blvd / Ponto Rd Signal 7.8 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 8.2- A
7 - Carlsbad Blvd / La Costa Ave Signal 28.8 - C
June 6, 2023 Item #2 54 of 88
Table 10. Future Year 2035 Intersection LOS Summary - Summer Weekday
Table 11. Future Year 2035 Intersection LOS Summary - Summer Weekend
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Exhibit XX
Future 2050 Summer Level of Service Summary
AA
A
CD
D
AA
A
BA
B
AA
A
AA
A
CC
C
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxxx
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
Exhibit 21 Future Year 2050
Summer Level of Service Summary
Future Year 2035 Summer Level of Service Summary
June 6, 2023 Item #2 55 of 88
Palomar rport \\~
~
NTS
Michael Bake
INTERNATIONAL
South Carlsbad Boulevard Coastal Project- Transportation Assessment48
Vehicle Traffic analysis
FUTURE YEAR 2035 FALL OPERATIONS
Table 12 presents the Future Year 2035 fall conditions
weekday peak hour operational analysis and Table
13 presents the Future Year 2035 fall conditions peak
hour. Exhibit 22 summarizes the LOS results for
future fall conditions. Detailed analysis worksheets are provided in Appendix E.
Table 12. Future Year 2035 Intersection LOS Summary - Fall Weekday
Study Intersection Traffic Control
Future Year 2035 Baseline Conditions(Fall Weekday)AM PM
Delay1 - LOS Delay
1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 6.2 - A 7.8 - A
2 - Carlsbad Blvd / Island Way Signal 16.7 - B 145.1 - F
3 - Carlsbad Blvd / Breakwater Rd Signal 4.6 - A 5.7 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 9.3 - A 11.6 - B
5 - Carlsbad Blvd / Ponto Rd Signal 7.5 - A 9.4 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 7.8 - A 7.5 - A
7 - Carlsbad Blvd / La Costa Ave Signal 19.9 - B 45.8 - D
Table 13. Future Year 2035 Intersection LOS Summary - Fall Weekend
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
As shown, intersections along the corridor are forecast
to operate at LOS D or better by the year 2035 during
the fall with the exception of Carlsbad Boulevard
at Island Way (LOS F, weekday PM conditions). Consistent with existing conditions, the pedestrian
crossing time at Carlsbad Boulevard and Island Way
results in an average vehicle delay of 145.1 seconds.
Study Intersection Traffic Control
Future Year 2035 Baseline Conditions (Fall Weekend)Midday
Delay1 - LOS
1 - Carlsbad Blvd / Solamar Dr Signal 6.7 - A
2 - Carlsbad Blvd / Island Way Signal 21.9 - C
3 - Carlsbad Blvd / Breakwater Rd Signal 4.3 - A
4 - Carlsbad Blvd / Poinsettia Ln Signal 10.1 - B
5 - Carlsbad Blvd / Ponto Rd Signal 8.3 - A
6 - Carlsbad Blvd / Avenida Encinas Signal 8.0 - A
7 - Carlsbad Blvd / La Costa Ave Signal 20.7 - C
June 6, 2023 Item #2 56 of 88
Table 12. Future Year 2035 Intersection LOS Summary - Fall Weekday
Table 13. Future Year 2035 Intersection LOS Summary - Fall Weekend
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Exhibit XX
Future 2050 Fall Level of Service Summary
AA
A
BF
C
AA
A
AB
B
AA
A
AA
A
BD
C
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
Exhibit 22
Future Year 2050
Fall Level of
Service Summary
Future Year 2035 Fall Level of Service Summary
June 6, 2023 Item #2 57 of 88
~
NTS
Michael Baker
INTERNATIONAL
• ~
151
151
□ ■ □ □ ._ _______________________ ...... ■
South Carlsbad Boulevard Coastal Project- Transportation Assessment50
Vehicle Traffic analysis
PROPOSED PROJECT
IMPROVEMENTS INTERSECTION
ANALYSIS
As discussed previously, three roadway options
have been designed for the first mile of the corridor
from Manzano Drive to Island Way. Two of the three options consisted shifting travel lanes to the east side
of Carlsbad Boulevard and westernmost side of the
road would be converted to public space and new
pedestrian and bicycle facilities. Shifting the lanes
to the east side of Carlsbad Boulevard reduces the number of lanes on the corridor to one northbound
and one southbound lane.
Table 14. Roadway Option Features
This Transportation Assessment evaluates the
operating conditions associated with the following
three options developed for the initial one-mile section
of the project:
• Option 1: Four Lanes with Traffic Signals
• Option 1: Two Lanes with Roundabouts
• Option 3: Two lanes with Roundabouts and
Enhanced Pedestrian Crossing or Traffic Signal at Solamar Drive
Table 14 summarizes the three roadway options and
the benefits of each. Table 15 summarizes the traffic
control alternatives for each option for the intersections that are affected by the project. Exhibits 2, 3, and 4 at
the beginning of this report, show the proposed project
options concepts developed by the City of Carlsbad.
It should be noted that the intersections south of
the project, intersections 3 through 7, will remain unaffected and are anticipated to operate the same as
the baseline conditions analyzed previously.
Table 15. Roadway Options Traffic Control Alternatives
Hybrid = modified pedestrian crossing (i.e. rectangular rapid flashing beacon) with right-in/right-out and left-in/left-out movements
DNE = Does not exist
Study Intersection Existing Option 1 - Signals Option 2 - Roundabouts
Option 3 - Roundabouts with Hybrid
101 - Carlsbad Blvd / Palomar Airport Road Grade-
Separated Signal Roundabout Roundabout
1 - Carlsbad Blvd / Solamar Dr Signal Signal Roundabout Hybrid
2 - Carlsbad Blvd / Island Way Signal Signal Roundabout Roundabout
June 6, 2023 Item #2 58 of 88
Current roadway No No Limited No No No Limited Limited Traffic
signal
Option 1 Satisfactory Satisfactory Safe Yes Yes Satisfactory Satisfactory Satisfactory Traffic
Four lanes with signal
traffic signa Is
Option 2 Better Best Safest Yes Yes Best Yes Best Roundabout
Two lanes with
roundabouts
Option 3 Best Better Safer Yes Yes Better Yes Better Enhanced
Two lanes with pedestrian
hybrid intersection crossing,
control right turn
only exit
51
Vehicle Traffic analysis
South Carlsbad Boulevard Coastal Project- Transportation Assessment
OPTION 1 - FOUR LANES WITH
TRAFFIC SIGNALS
Option 1 would reconfigure Carlsbad Boulevard and
Palomar Airport Road to remove the grade separation and construct a new traffic signal at the intersection.
Four lanes would be maintained along the roadway
segments throughout the project area as well as on
the intersection approaches. A new traffic signal would
also be constructed approximately 1,200 feet to the north of Palomar Airport Road to provide access to the
existing “turnaround” parking lot. The existing traffic
signals at Solamar Drive and Island Way would be
modified to remove the existing median. A fourth leg
would be constructed at Island Way to provide access to the existing cliff-side parking. In addition, buffered
bike lanes would be provided through the project area.
A Class I shared use path and a dedicated pedestrian
pathway that are separated from the roadway would
be constructed on the west side of the corridor.
SUMMER INTERSECTION ANALYSIS
Tables 16 and 17 presents Future Year 2035 Option 1
summer conditions weekday and weekend operational
analysis, respectively. Exhibit 23 summarizes the LOS results for Option 1 summer conditions. Detailed
analysis worksheets are provided in Appendix F.
With Option 1, the modified intersections within the
study area are forecast to operate at LOS D or better during the summer.
June 6, 2023 Item #2 59 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment52
Vehicle Traffic analysis
Table 16. Option 1 Intersection LOS Summary - Summer Weekday
Study Intersection
Future Year 2035 Conditions (Summer Weekday)
Baseline Option 1 - Signals
Traffic Control AM PM Traffic Control AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar Airport Road G.S --Signal 42.1 - D 41.4 - D
1 - Carlsbad Blvd / Solamar Dr Signal 7.7 - A 7.6 - A Signal 7.8 - A 6.3 - A
2 - Carlsbad Blvd / Island Way Signal 22.7 - C 52.7 - D Signal 7.8 - A 5.4 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicle
LOS - Level of Service
DNE - Does Not Exist
G.S - Grade Separated
Table 17. Option 1 Intersection LOS Summary - Summer Weekend
Study Intersection
Future Year 2035 Conditions (Summer Weekend)
Baseline Option 1 - Signals
Traffic Control Midday Traffic Control Midday
Delay1 - LOS Delay1 - LOS
101 - Carlsbad Blvd / Palomar Airport Road G.S -Signal 42.9 - D
1 - Carlsbad Blvd / Solamar Dr Signal 8.5 - A Signal 8.1 - B
2 - Carlsbad Blvd / Island Way Signal 35.9 - D Signal 7.2 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicle
LOS - Level of ServiceDNE - Does Not Exist
G.S - Grade Separated
June 6, 2023 Item #2 60 of 88
Table 16. Option 1 Intersection LOS Summary - Summer Weekday
Table 17. Option 1 Intersection LOS Summary - Summer Weekend
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Exhibit XX
Option 1 Summer Level of Service Summary
AA
A
AA
A
Study Intersection#
AM Peak Hour LOSxxx
PM Peak Hour LOSxxx
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
101
DD
D
Exhibit 23
Option 1 Summer
Level of Service
Summary
Option 1 Summer Level of Service Summary
June 6, 2023 Item #2 61 of 88
~
NTS
Michael Baker
INTERNATIONAL
• Cn1
Cn1
Cn1
□ ■ □ □ .__ ______________________ __,■
South Carlsbad Boulevard Coastal Project- Transportation Assessment54
Vehicle Traffic analysis
Table 18. Option 1 Intersection LOS Summary - Fall Weekday
Study Intersection
Future Year 2035 Conditions (Fall Weekday)
Baseline Option 1 - Signals
Traffic Control
AM PM Traffic Control
AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road G.S --Signal 79.9 - E 44.8 - D
1 - Carlsbad Blvd / Solamar Dr Signal 6.2 - A 7.8 - A Signal 4.8 - A 5.4 - A
2 - Carlsbad Blvd / Island Way Signal 16.7 - B 145.1 - F Signal 7.2 - A 5.1 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicle
LOS - Level of ServiceDNE - Does Not Exist
G.S - Grade Separated
Table 19. Option 1 Intersection LOS Summary - Fall Weekend
Study Intersection
Future Year 2035 Conditions (Fall Weekend)
Baseline Option 1 - Signals
Traffic Control
Midday Traffic Control
Midday
Delay1 - LOS Delay1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road G.S -Signal 33.4 - C
1 - Carlsbad Blvd / Solamar Dr Signal 6.7 - A Signal 4.9 - A
2 - Carlsbad Blvd / Island Way Signal 21.9 - C Signal 7.2 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicle
LOS - Level of ServiceDNE - Does Not Exist
G.S - Grade Separated
FALL INTERSECTION ANALYSIS
Tables 18 and 19 presents the Future Year 2035
Option 1 fall conditions weekday and weekend peak
hour operational analysis, respectively. Exhibit 24 summarizes the LOS results for Option 1 fall
conditions. Detailed analysis worksheets are provided
in Appendix F.
With Option 1, the modified intersections within the
study area are forecast to operate at LOS D or better
during the fall.
June 6, 2023 Item #2 62 of 88
Table 18. Option 1 Intersection LOS Summary - Fall Weekday
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Exhibit XX
Option 1 Fall Level of Service Summary
AA
A
AA
A
Study Intersection#
AM Peak Hour LOSxxx
PM Peak Hour LOSxxx
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
101
ED
C
Exhibit 24
Option 1 Fall
Level of Service
Summary
Option 1 Fall Level of Service Summary
June 6, 2023 Item #2 63 of 88
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NTS
Michael Baker
INTFRN4TION41
• ~ ~
~
□ ■ □ □ -------------------------■
South Carlsbad Boulevard Coastal Project- Transportation Assessment56
Vehicle Traffic analysis
Table 20. Option 2 Intersection LOS Summary - Summer Weekday
Study Intersection
Future Year 2035 Conditions (Summer Weekday)
Baseline Option 2 - Roundabouts
Traffic Control
AM PM Traffic Control
AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road G.S -- Roundabout 8.0 - A 15.5 - B
1 - Carlsbad Blvd / Solamar Dr Signal 7.7 - A 7.6 - A Roundabout 4.3 - A 3.4 - A
2 - Carlsbad Blvd / Island Way Signal 22.7 - C 52.7 - D Roundabout 4.1 - A 6.1 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
DNE - Does Not ExistG.S - Grade Separated
Table 21. Option 2 Intersection LOS Summary - Summer Weekend
Study Intersection
Future Year 2035 Conditions (Summer Weekend)
Baseline Option 1 - Roundabouts
Traffic Control
Midday Traffic Control
Midday
Delay1 - LOS Delay1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road G.S - Roundabout 27.8 - C
1 - Carlsbad Blvd / Solamar Dr Signal 8.5 - A Roundabout 7.0 - A
2 - Carlsbad Blvd / Island Way Signal 35.9 - D Roundabout 7.0 - A
Note: Deficient intersection operations
in bold
1 Average seconds of delay per vehicle
LOS - Level of ServiceDNE - Does Not Exist
G.S - Grade Separated
OPTION 2 - TWO LANES WITH
ROUNDABOUTS
Option 2 would realign Palomar Airport Road and
Carlsbad Boulevard and construct a new single-lane roundabout. The roadway would be reduced to
two lanes throughout the initial one mile section of
the study area. A new single-lane roundabout would
also be constructed approximately 1,100-feet to the
north to provide access to the existing “turnaround” parking lot. The existing traffic signals at Solamar
Drive and Island Way would be replaced with single-
lane roundabouts. A fourth leg would be constructed
at Island Way to provide access to the existing cliff-
side parking. In addition, buffered bike lanes would be
provided through the project area. A Class I shared use path and a dedicated pedestrian pathway that are
separated from the roadway would be constructed on
the west side of the corridor.
SUMMER INTERSECTION ANALYSIS
Table 20 and 21 present the Future Year 2035 Option 2
summer conditions weekday and weekend operational
analysis, respectively. Exhibit 25 summarizes the LOS results for Option 2 summer conditions. Detailed
analysis worksheets are provided in Appendix G.
With Option 2, the modified intersections within the
study area are forecast to operate at LOS C or better during the summer.
June 6, 2023 Item #2 64 of 88
Table 20. Option 2 Intersection LOS Summary - Summer Weekday
Study Intersection
Future Year 2035 Conditions (Summer Weekday)
BaselineOption 2 - Roundabouts
Traffic Control
AMPMTraffic Control
AMPM
Delay1 - LOS Delay
1 - LOSDelay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar
Airport RoadG.S-- Roundabout8.0 - A15.5 - B
1 - Carlsbad Blvd / Solamar Dr Signal7.7 - A 7.6 - ARoundabout4.3 - A3.4 - A
2 - Carlsbad Blvd / Island WaySignal 22.7 - C 52.7 - D Roundabout4.1 - A6.1 - A
Study Intersection
Future Year 2035 Conditions (Summer Weekend)
BaselineOption 1 - Roundabouts
Traffic Control
MiddayTraffic Control
Midday
Delay1 - LOSDelay1 - LOS
101 - Carlsbad Blvd / Palomar
Airport RoadG.S- Roundabout 27.8 - C
1 - Carlsbad Blvd / Solamar Dr Signal8.5 - ARoundabout7.0 - A
2 - Carlsbad Blvd / Island WaySignal 35.9 - D Roundabout7.0 - A
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Exhibit XX
Option 2 Summer Level of Service Summary
AA
A
AA
A
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
101
AB
C
Exhibit 25
Option 2 Summer
Level of Service
Summary
Option 2 Summer Level of Service Summary
June 6, 2023 Item #2 65 of 88
~
NTS
Michael Baker
• ~
151
151
□ ■ □ □ _____________________ __._ ...... ■
INTERNATIONAL
South Carlsbad Boulevard Coastal Project- Transportation Assessment58
Vehicle Traffic analysis
Table 22. Option 2 Intersection LOS Summary - Fall Weekday
Study Intersection
Future Year 2035 Conditions (Fall Weekday)
Baseline Option 2 - Roundabouts
Traffic Control
AM PM Traffic Control
AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road G.S -- Roundabout 9.5 - A 23.9 - C
1 - Carlsbad Blvd / Solamar Dr Signal 6.2 - A 7.8 - A Roundabout 4.6 - A 6.3 - A
2 - Carlsbad Blvd / Island Way Signal 16.7 - B 145.1 - F Roundabout 4.3 - A 6.9 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicle
LOS - Level of Service
DNE - Does Not ExistG.S - Grade Separated
Table 23. Option 2 Intersection LOS Summary - Fall Weekend
Study Intersection
Future Year 2035 Conditions (Fall Weekend)
Baseline Option 2 - Roundabouts
Traffic Control
Midday Traffic Control
Midday
Delay1 - LOS Delay1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road G.S - Roundabout 11.6 - B
1 - Carlsbad Blvd / Solamar Dr Signal 6.7 - A Roundabout 5.1 - A
2 - Carlsbad Blvd / Island Way Signal 21.9 - D Roundabout 5.2 - A
Note: Deficient intersection operations
in bold
1 Average seconds of delay per vehicleLOS - Level of Service
DNE - Does Not ExistG.S - Grade Separated
FALL INTERSECTION ANALYSIS
Tables 22 and 23 present the Future Year 2035 Option
2 fall conditions weekday and weekend operational
analysis, respectively. Exhibit 26 summarizes the LOS
results for Option 2 fall conditions. Detailed analysis
worksheets are provided in Appendix G.
With Option 2, the modified intersections within the study area are forecast to operate at LOS D or better)
during the fall.
June 6, 2023 Item #2 66 of 88
Table 22. Option 2 Intersection LOS Summary - Fall Weekday
Study Intersection
Future Year 2035 Conditions (Fall Weekend)
BaselineOption 2 - Roundabouts
Traffic Control
MiddayTraffic Control
Midday
Delay1 - LOSDelay1 - LOS
101 - Carlsbad Blvd / Palomar
Airport RoadG.S- Roundabout 11.6 - B
1 - Carlsbad Blvd / Solamar Dr Signal6.7 - ARoundabout5.1 - A
2 - Carlsbad Blvd / Island WaySignal 21.9 - D Roundabout5.2 - A
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Exhibit XX
Option 2 Fall Level of Service Summary
AA
A
AA
A
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xxx Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
101
AC
B
Exhibit 26
Option 2 Fall
Level of Service
Summary
Option 2 Fall Level of Service Summary
June 6, 2023 Item #2 67 of 88
~
NTS
Michael Baker
INTS:l>NIITlnNAI
• ~
~
~
□ ■ □ □ ._ ______________________ __,■
South Carlsbad Boulevard Coastal Project- Transportation Assessment60
Vehicle Traffic analysis
OPTION 3 - TWO LANES WITH
ROUNDABOUTS AND ENHANCED
PEDESTRIAN CROSSING OR TRAFFIC
SIGNAL AT SOLAMAR DRIVE
Option 3 would realign Carlsbad Boulevard and Palomar Airport Road and construct a new single-
lane roundabout at the new intersection. The roadway
would be reduced to two lanes throughout the study
area. A new single-lane roundabout would also be
constructed approximately 1,100 feet to the north to provide access to the existing “turnaround” parking
lot. The existing traffic signal at Island Way would be
replaced with a single-lane roundabout and a fourth
leg would be constructed to provide access to the
existing cliff-side parking. The existing traffic signal at Solamar Drive would be converted to a traffic signal
with one through lane in each direction or a controlled
pedestrian crossing with restricted westbound-left
turns out of Solamar Drive (right-in, right-out, left-in
only) when erosion reduces the area and results in the signalized intersection becoming non-operational as
determined by the City Engineer. In addition, buffered
bike lanes would be provided through the project area.
A Class I shared use path and a dedicated pedestrian
pathway that are separated from the roadway would be constructed on the west side of the corridor.
With the restricted access to Solamar Drive, drivers
that are traveling south would be required to turn right
out of Solamar Drive, and make a U-turn at Palomar
Airport Road. For the purposes of this analysis, traffic volumes were manually reassigned to account for this
turn restriction.
SUMMER INTERSECTION ANALYSIS
Table 24 and 25 present the Future Year 2035 Option
3 summer conditions weekday and weekend peak
hour operational analysis, respectively. Exhibit 27 summarizes the LOS results for Option 3 summer
conditions. Detailed analysis worksheets are provided
in Appendix H.
With Option 3, the modified intersections within the study area are forecast to operate at LOS D or better
during summer operations.
Study Intersection
Future Year 2035 Conditions
(Summer Weekday)
Baseline Option 3 - Roundabouts with Hybrid
Traffic Control
AM PM Traffic Control
AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar Airport Road DNE -- Roundabout 8.7 - A 17.4 - B
1 - Carlsbad Blvd / Solamar Dr Signal 7.7 - A 7.6 - A Hybrid 10.7 - B 16.8 - B
2 - Carlsbad Blvd / Island Way Signal 22.7 - C 52.7 - D Roundabout 4.1 - A 6.1 - A
June 6, 2023 Item #2 68 of 88
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Table 24. Option 3 Intersection LOS Summary - Summer Weekday
Study Intersection
Future Year 2035 Conditions
(Summer Weekday)
Baseline Option 3 - Roundabouts with Hybrid
Traffic Control
AM PM Traffic Control
AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar Airport Road DNE -- Roundabout 8.7 - A 17.4 - B
1 - Carlsbad Blvd / Solamar Dr Signal 7.7 - A 7.6 - A Hybrid 10.7 - B 16.8 - B
2 - Carlsbad Blvd / Island Way Signal 22.7 - C 52.7 - D Roundabout 4.1 - A 6.1 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
DNE - Does Not Exist
G.S - Grade Separated
Table 25. Option 3 Intersection LOS Summary - Summer Weekend
Study Intersection
Future Year 2035 Conditions
(Summer Weekend)
Baseline Option 3 - Roundabouts with Hybrid
Traffic Control
Midday Traffic Control
Midday
Delay1 - LOS Delay1 - LOS
101 - Carlsbad Blvd / Palomar Airport Road DNE - Roundabout 37.8 - D
1 - Carlsbad Blvd / Solamar Dr Signal 8.5 - A Hybrid 18.3 - B
2 - Carlsbad Blvd / Island Way Signal 35.9 - D Roundabout 7.0 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
DNE - Does Not Exist
G.S - Grade Separated
June 6, 2023 Item #2 69 of 88
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Exhibit XX
Option 3 Summer Level of Service Summary
BB
B
AA
A
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xx
x Weekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
101
AB
D
Exhibit 27
Option 3 Summer
Level of Service
Summary
Option 3 Summer Level of Service Summary
June 6, 2023 Item #2 70 of 88
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INT E RNATIONAL
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Vehicle Traffic analysis
South Carlsbad Boulevard Coastal Project- Transportation Assessment
Table 26. Option 3 Intersection LOS Summary - Fall Weekday
Study Intersection
Future Year 2035 Conditions (Fall Weekday)
Baseline Option 3 - Roundabouts with Hybrid
Traffic Control
AM PM Traffic Control
AM PM
Delay1 - LOS Delay
1 - LOS Delay1 - LOS Delay
1 - LOS
101 - Carlsbad Blvd / Palomar Airport Road DNE -- Roundabout 10.5 - B 31.2 - C
1 - Carlsbad Blvd / Solamar Dr Signal 6.2 - A 7.8 - A Hybrid 10.3 - B 19.0 - C
2 - Carlsbad Blvd / Island Way Signal 16.7 - B 145.1 - F Roundabout 4.3 - A 6.9 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicleLOS - Level of Service
DNE - Does Not ExistG.S - Grade Separated
Table 27. Option 3 Intersection LOS Summary - Fall Weekend
Study Intersection
Future Year 2035 Conditions (Fall Weekend)
Baseline Option 3 - Roundabouts with Hybrid
Traffic Control
Midday Traffic Control
Midday
Delay1 - LOS Delay1 - LOS
101 - Carlsbad Blvd / Palomar
Airport Road DNE - Roundabout 12.6 - B
1 - Carlsbad Blvd / Solamar Dr Signal 6.7 - A Hybrid 12.2 - B
2 - Carlsbad Blvd / Island Way Signal 21.9 - C Roundabout 5.2 - A
Note: Deficient intersection operations in bold
1 Average seconds of delay per vehicle
LOS - Level of ServiceDNE - Does Not Exist
G.S - Grade Separated
FALL INTERSECTION ANALYSIS
Tables 26 and 27 present the Future Year 2035
Option 3 fall conditions weekday and weekend peak
hour operational analysis, respectively. Exhibit 28 summarizes the LOS results for Option 3 fall
conditions. Detailed analysis worksheets are provided
in Appendix H.
With Option 3, the modified intersections within the
study area are forecast to operate at LOS D or better
during the fall with the exception of Carlsbad Boulevard
at Palomar Airport Road during the weekday PM peak hour (LOS E). The additional U-turns due to the turn
restriction at Solamar Drive increase the overall delay
for this intersection.
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Exhibit XX
Option 3 Fall Level of Service Summary
BC
B
AA
A
Study Intersection#
AM Peak Hour LOSxx
x
PM Peak Hour LOSxx
x
xxxWeekend Mid Day LOS
LOS A or B
LOS C
LOS D
LOS E
LOS F
101
BC
B
Option 3 Fall Level of Service Summary
Exhibit 28
Option 3 Fall
Level of Service
Summary
Table 28. Intersection Operations - Future Year 2035 (Summer)
Table 29. Intersection Operations - Future Year 2035 (Fall)
June 6, 2023 Item #2 72 of 88
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Michael Baker
INTFRN4TlnN41
• Cn1
Cn1
Cn1
□ ■ □ □ _____________________ __._ ...... ■
65
Vehicle Traffic analysis
South Carlsbad Boulevard Coastal Project- Transportation AssessmentExhibit 28
Option 3 Fall
Level of Service
Summary
INTERSECTION OPERATIONS -
FUTURE YEAR 2035
Table 28 summarizes the summer LOS results for
each option. The intersections analyzed for all three options are forecast to operate at LOS D or better.
Table 29 summarizes the fall LOS results for each
option. The intersections analyzed for all three options
Intersection
Future Year 2035 Conditions (Summer)
Baseline Option 1- Signals
Option 2 - Roundabouts
Option 3 - Roundabouts with Hybrids
AM PM
Weekend Midday AM PM
Weekend Midday AM PM
Weekend Midday AM PM
Weekend Midday
101 - Carlsbad Blvd / Palomar Airport Road D D D A B C A B D
1 - Carlsbad Blvd /
Solamar Dr A A A A A A A A A B B B
2 - Carlsbad Blvd /
Island Way C D D A A A A A A A A A
Table 28. Intersection Operations - Future Year 2035 (Summer)
are forecast to operate at LOS D or better with the
exception at Carlsbad Boulevard and Palomar Airport
Road which is forecast to operate at LOS E in Option 1
due to u-turns from Solamar Drive. Carlsbad Boulevard and Island Way is forecast to operate at LOS F during
the PM Peak Hour if no changes are made to the
roadway.
Intersection
Future Year 2035 Conditions (Fall)
Baseline Option 1- Signals
Option 2 - Roundabouts
Option 3 - Roundabouts with Hybrids
AM PM
Weekend Midday AM PM
Weekend Midday AM PM
Weekend Midday AM PM
Weekend Midday
101 - Carlsbad Blvd / Palomar Airport Road E D C A C B B C B
1 - Carlsbad Blvd /
Solamar Dr A A A A A A A A A B C B
2 - Carlsbad Blvd / Island Way B F C A B A A A A A A A
Table 29. Intersection Operations - Future Year 2035 (Fall)
June 6, 2023 Item #2 73 of 88
··-·■--------------------------------• ----------------------------------------------------------------------------------------
------------------·-------------------------------------------·------------------------· --------·---------· -----------------
South Carlsbad Boulevard Coastal Project- Transportation Assessment66
Vehicle Traffic analysis
QUEUING ASSESSMENT
Due to the higher volumes through the intersection at the Carlsbad Boulevard and Palomar Airport Road,
a queuing assessment was conducted to determine
if the queues would exceed the available storage or
affect operations of adjacent intersections. The 95th
percentile queue lengths are reported based on the Sidra analysis, which reflects a queue length (in feet)
that has a 5-percent probability of being exceeded
during the peak hour.
Table 30 summarizes the 95th percentile queue for Future Year 2035 fall and summer conditions.
Option 1 and 2 were analyzed due to the proximity
of the proposed Solamar Drive and Palomar Airport
Road roundabout or traffic signal (710 feet of storage
northbound for Option 1 and 525 feet of storage for Option 2). The northbound summer queue for Option
1 and 2 is forecast to extend past Solamar Drive
during the weekend midday condition. Option 2 is also
forecast to extend past Solamar Drive during the Fall
PM Peak Hour.
To address this potential queuing issue, the city’s
design team will be moving the roundabout at Palomar
Airport Road to the north to accommodate right of way for a northbound right turn bypass if needed in the
future.
In order to optimize the future performance of the
roundabout, the design will allow for future construction of signals on all of the approaches. Traffic signals on
the approaches would allow the City to meter the flow
of traffic through the roundabout, which will allow for
prioritization on specific approaches to address queue
or operational issues.
Table 30. Option 1 & Option 2 Queue Assessment - Carlsbad Boulevard at Palomar Airport Road
Northbound Queue Distance (ft)
Option 1 - Traffic Signals
Distance to Solamar Drive 710
Summer
AM 131
PM 322
Weekend Midday 830
Fall
AM 76
PM 442
Weekend Midday 298
Option 2 - Roundabouts Distance (ft)
Distance to Solamar Drive 525
Summer
AM 56
PM 370
Weekend Midday 801
Fall
AM 55
PM 554
Weekend Midday 165
June 6, 2023 Item #2 74 of 88
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ALTERNATIVE CONSIDERATIONS
As shown previously,the single lane roundabout at Carlsbad Boulevard and Palomar Airport Road is to
operate at LOS D or better during the summer and
fall conditions under Option 2 as a three-legged
roundabout. The roundabout is forecast to operate
at LOS E during the fall PM conditions under Option 3 due to u-turns stemming from turn restrictions included
in the controlled pedestrian crossing at Solamar Drive.
Two alternatives are described in the following sections
that could be considered as potential modifications to the roundabout at Palomar Airport Road to address
potential queuing and operational issues.
FOUR-LEGGED ROUNDABOUT
The proposed roundabout at Palomar Airport Road
is configured to include a fourth leg on the west
side of the intersection that would provide access to
the parking lot. This would remove the need for an
additional intersection to the north but would move a the traffic associated with the parking lot to Palomar
Airport Road.
An initial assessment showed that constructing a four
leg roundabout would have little affect on delay and would maintain LOS D or better.
DEDICATED NORTHBOUND RIGHT
TURN LANE
Another alternative for the proposed roundabout under Options 2 and 3 at Palomar Airport Road would
be to move the center of the roundabout north of the
location identified on the conceptual designs for the
two options. This would move the roundabout further
away from the adjacent Hilton Garden Inn property line. This would reserve right-of-way to construct a
dedicated northbound right-turn lane if needed to
address northbound queues and reduce northbound
approach delay.
An initial assessment showed that constructing a
dedicated northbound right turn lane would reduce
further delay and improve the LOS to LOS D or better.
This additional right turn lane could be construction as
a later phase if an queuing becomes an issue.
The final design will include a preliminary traffic signal
plan including conduits, electrical/communications
connection boxes, and signal pole locations to allow
for potential future signalization. This would provide additional operational flexibility and capability to
signalize in order to address future operational issues
if needed without reconstructing the roundabout.
June 6, 2023 Item #2 75 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment68
Bicycle & Pedestrian MMlOs analysis Bicycle & Pedestrian
MMLOS Analysis
EXISTING MMLOS RESULTS
OPTIONS MMLOS RESULTS
June 6, 2023 Item #2 76 of 88
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Bicycle & Pedestrian MMlOs analysis
South Carlsbad Boulevard Coastal Project- Transportation Assessment
BICYCLE & PEDESTRIAN MMLOS
ANALYSIS
The Multimodal Level of Service Analysis (MMLOS)
is based on the methodology provided by the City of Carlsbad which is consistent with the City’s General
Plan. The MMLOS analysis uses a point system and
LOS rating as described in the City’s Multimodal Level
of Service Tool user guide, and shown in Table 31,
to describe the quality of the pedestrian and bicycle facilities. In accordance with the City’s Transportation
Impact Analysis Guidelines (2022), as a Coastal
Street, Carlsbad Boulevard is subject to a Bicycle and
Pedestrian MMLOS Analysis.
EXISTING MMLOS RESULTS
Sidewalks are currently not provided on either side of Carlsbad Boulevard from Manzano Drive to
Breakwater Road. Starting at Breakwater Road, a
non-continuous sidewalk is provided on the east side
of the road and ends just south of Poinsettia Lane.
Six-foot bike lanes are present along both sides of Carlsbad Boulevard. Table 32 shows the results of the
existing MMLOS analysis. Exhibit 31 illustrates the
Pedestrian MMLOS results and Exhibit 32 illustrates
the bicycle MMLOS results. MMLOS worksheets are
provided in Appendix I.
Existing pedestrian conditions along the corridor vary
widely, with poor or LOS F pedestrian conditions on
many segments. This is primarily due to lack of sidewalk
or basic ADA compliant features. The existing bicycle lanes along the corridor resulted in good bicycle
scores (LOS A). Improvements such as buffered
bicycle lanes, reduced lane widths and new sidewalks
improve the pedestrian and bicycle conditions to a
point where all segments have acceptable walking or bicycling conditions (LOS C or better) throughout the
study area.
Point Score LOS Standard
90-100 A
Acceptable80-89 B
70-79 C
60-69 D
50-59 E Deficient0-49 F
Table 31. MMLOS Thresholds
June 6, 2023 Item #2 77 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment70
Bicycle & Pedestrian MMlOs analysis
Note: Bold Indicates deficient MMLOSOrange indicates the one-mile project area
Table 32. Existing MMLOS Summary
Segment Direction Pedestrian Bicycle
Score LOS Score LOS
Carlsbad
Blvd
Manzano Dr to Palomar Airport Rd NB 40 F 100 A
SB 40 F 100 A
Palomar Airport Rd to 400 ft north of Solamar NB 40 F 100 A
SB 40 F 100 A
400 ft north of Solamar Dr to Solamar Dr NB 40 F 95 A
SB 40 F 95 A
Solamar Dr to 300 ft south of Solamar Dr NB 75 C 95 A
SB 40 F 90 A
300 ft south of Solamar Dr to 800 ft north of Island Way
NB 40 F 95 A
SB 40 F 95 A
800 ft north of Island Way to 300 ft north of
Island Way
NB 40 F 95 A
SB 40 F 95 A
300 ft north of Island Way to 150 ft north of
Island Way
NB 40 F 95 A
SB 40 F 95 A
150 ft north of Island Way to Island Way NB 75 C 95 A
SB 75 C 95 A
Island Way to 200 ft north Breakwater Rd NB 40 F 95 A
SB 40 F 95 A
200 ft north Breakwater Rd to Breakwater Rd NB 85 B 95 A
SB 40 F 95 A
Breakwater Rd to Poinsettia Ln NB 100 A 95 A
SB 40 F 95 A
Poinsettia Ln to 200 ft south of Poinsettia Ln NB 85 A 95 A
SB 85 A 95 A
200 ft south of Poinsettia Ln to Ponto Rd NB 95 A 95 A
SB 40 F 95 A
Ponto Rd to 850 ft south of Ponto Rd NB 100 A 95 A
SB 40 F 95 A
850 ft south of Ponto Rd to Avenida Encinas NB 40 F 95 A
SB 40 F 95 A
Avenida Encinas to 640 ft south of Avenida
Encinas
NB 40 F 95 A
SB 40 F 95 A
640 ft south of Avenida Encinas to 1500 ft
south of Avenida Encinas
NB 40 F 95 A
SB 40 F 95 A
1500 south of Avenida Encinas to 1500 ft
north of La Costa Ave
NB 40 F 95 A
SB 40 F 95 A
500 ft north of La Costa Ave to 150 ft north of La Costa Ave
NB 40 F 95 A
SB 40 F 90 A
June 6, 2023 Item #2 78 of 88
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Exhibit 13
Existing Pedestrian MMLOS
LegendMMLOS AMMLOS B
MMLOS CMMLOS D-F
Initial 1-Mile Section
Existing Pedestrian MMLOS
Exhibit 29
Existing Pedestrian
MMLOS
June 6, 2023 Item #2 79 of 88
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Exhibit 12
Existing Bicycle MMLOS
LegendMMLOS AMMLOS B
MMLOS CMMLOS D-F
Initial 1-Mile Section
Existing Bicycle MMLOS
Exhibit 30
Existing Bicycle
MMLOS
Table 33. Roadway Option Features
June 6, 2023 Item #2 80 of 88
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Bicycle & Pedestrian MMlOs analysis
South Carlsbad Boulevard Coastal Project- Transportation AssessmentExhibit 30
Existing Bicycle
MMLOS
OPTIONS 1-3 MMLOS ANALYSIS
All three options were analyzed using the City’s
MMLOS Tool. Each option had planned improvements
for bicycle and pedestrian infrastructure including:
• 8-foot bike lanes with 20-foot multiuse path
• High-visibility crosswalks and ADA enhancements
• 10-foot pedestrian path and sidewalks
The image below illustrates a summary comparison
of all three options and the benefits of each project.
This information was used for the MMLOS analysis in
order to show whether or not the alternative projects
will improve bicycle and pedestrian conditions.
Table 33. Roadway Option Features Photo 8 Carlsbad Blvd & Avenida Encinas
June 6, 2023 Item #2 81 of 88
Current roadway No No Limited No No No Limited Limited Traffic
signal
Option 1 Satisfactory Satisfactory Safe Yes Yes Satisfactory Satisfactory Satisfactory Traffic
Four lanes with signal
traffic signals
Option 2 Better Best Safest Yes Yes Best Yes Best Roundabout
Two lanes with
roundabouts
Option 3 Best Better Safer Yes Yes Better Yes Better Enhanced
Two lanes with pedestrian
hybrid intersection crossing,
control right turn
only exit
South Carlsbad Boulevard Coastal Project- Transportation Assessment74
Bicycle & Pedestrian MMlOs analysis
OPTIONS MMLOS RESULTS
Since the pedestrian and bicycle improvements for all three options are relatively consistent, MMLOS analysis
was conducted once and is representative of the conditions for all three options. Results of the MMLOS analysis
shows the planned pedestrian path, bicycle path, bicycle lanes, sidewalks, and intersection controls through the
initial one-mile section will be beneficial to bicycle and pedestrian travel. The MMLOS summary is highlighted in
Table 33 where green indicates an improvement and orange indicates that there was no change to the MMLOS from the existing conditions summary. Exhibit 33 summarizes the results of the pedestrian MMLOS and Exhibit 34 summarizes the results of the bicycle MMLOS.
It is important to note that the options mentioned make up one-mile of the three-mile study area. The existing
conditions MMLOS analysis analyzes all of the three-mile study area while the MMLOS summaries for the options considered analyzes only the one-mile section.
Segment Direction Pedestrian Bicycle
Score LOS Score LOS
Carlsbad Blvd
Manzano Dr to Palomar Airport Rd NB 100 A 100 A
SB 100 A 100 A
Palomar Airport Rd to 400 ft north of Solamar Dr
NB 100 A 100 A
SB 100 A 100 A
400 ft north of Solamar Dr to Solamar Dr NB 100 A 95 A
SB 100 A 95 A
Solamar Dr to 300 ft south of Solamar Dr NB 100 A 95 A
SB 100 A 90 A
300 ft south of Solamar Dr to 800 ft north of
Island Way
NB 100 A 95 A
SB 100 A 95 A
800 ft north of Island Way to 300 ft north of
Island Way
NB 100 A 95 A
SB 100 A 95 A
300 ft north of Island Way to 150 ft north of
Island Way
NB 100 A 95 A
SB 100 A 95 A
150 ft north of Island Way to Island Way NB 100 A 95 A
SB 100 A 95 A
Table 34. Options MMLOS Summary
June 6, 2023 Item #2 82 of 88
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Exhibit 13
Pedestrian MMLOS - ALternative 1 - 3
LegendMMLOS AMMLOS B
MMLOS CMMLOS D-F
Initial 1-Mile Section
Pedestrian MMLOS - Options 1 - 3
Exhibit 31
Pedestrian
MMLOS - Options
1-3
June 6, 2023 Item #2 83 of 88
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Exhibit 12
Existing Bicycle MMLOS
LegendMMLOS AMMLOS BMMLOS CMMLOS D-F
Initial 1-Mile Section
Bicycle MMLOS - Options 1 - 3
Exhibit 32
Bicycle MMLOS -
Options 1-3June 6, 2023 Item #2 84 of 88
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Exhibit 32
Bicycle MMLOS -
Options 1-3
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June 6, 2023 Item #2 85 of 88
South Carlsbad Boulevard Coastal Project- Transportation Assessment78
ConClusions
Conclusions
June 6, 2023 Item #2 86 of 88
79
ConClusions
South Carlsbad Boulevard Coastal Project- Transportation Assessment
INTERSECTION ANALYSIS
Currently intersections along the corridor operate at
acceptable levels of service (D or better), with the
exception of Carlsbad Boulevard and Island Way
which is currently operating at LOS F during the PM
peak hour in the Fall months.
By the year 2035, traffic volumes along Carlsbad
Boulevard are anticipated to increase at a rate of
0.5% per year. The intersection analysis shows
that most of the study intersections will continue to operate acceptable levels (D or better) except for the
intersection of Carlsbad Boulevard / Island Way, which
is forecast to operate at LOS F during the Fall PM
Peak Hour if no changes are made to the roadway.
Option 1 shows that most of the study intersections
are forecast to operate at acceptable levels (D or
better) during the summer. During the fall, all study
intersections are forecast to operate at acceptable
levels (LOS D or better) except for the proposed traffic signal at Carlsbad Boulevard and Palomar Airport
Road which is forecast to operate a LOS E during the
AM Peak Hour.
Option 2 shows that all study intersections are forecast to operate at acceptable levels (LOS D or better)
during the summer and fall months at all peak hours.
Option 3 shows that all study intersections are forecast
operate at acceptable levels (LOS D or better) during the summer and fall months at all peak hours.
MULTI-MODAL LEVEL OF SERVICE
ANALYSIS
To evaluate the overall benefits to pedestrians,
bicyclists and the transit users, an evaluation of level of comfort and accessibility was conducted using
the City’s Multi-Modal Level of Service (MMLOS)
methodology. The methodology assigns points based
on a series of criteria established for each mode, which
corresponds to a level of service of a given segment. Existing pedestrian conditions along the corridor
vary widely, with unacceptable or LOS F pedestrian
conditions on many segments. This is primarily due
to lack of sidewalk or basic ADA compliant features.
The existing bicycle lanes along the corridor resulted in acceptable bicycle scores (LOS A). The proposed
project improvements such as buffered bicycle lanes,
reduced lane widths and new sidewalks improve the
pedestrian and bicycle conditions to a point where
all segments have acceptable walking or bicycling conditions (LOS C or better) throughout the one-mile
project area.
June 6, 2023 Item #2 87 of 88
Position of preference for South Carlsbad
Boulevard Climate Adaptation Project
Tom Frank, Transportation Director/City Engineer
Katie Hentrich, Senior Program Manager
June 6, 2023
~ City of
Carlsbad
RECOMMENDED ACTION
At the request of Beach Preservation
Commission Chair Steindlberger and
Commissioner Woolsey, consider
taking a position of preference on one
of the preliminary conceptual roadway
options for the South Carlsbad
Boulevard Climate Adaptation Project.
SOUTH CARLSBAD BOULEVARD
tyof
~lsbad
TODAY’S PRESENTATION
•PROJECT OVERVIEW
•TRAFFIC STUDY
•COMMUNITY ENGAGEMENT
•NEXT STEPS
SOUTH CARLSBAD BOULEVARD
{__ City of
Carlsbad
PROJECT AREA
SOUTH CARLSBAD BOULEVARD
.
-South Carlsbad Coastline Project /
South Carlsbad Boulevard
Climate Adaptation Project
)
>-,.
··················· ..............•.....
Carlsbad Blvd
CLIMATE ADAPTATION GOALS
•Funded by State Coastal Conservancy grant
•Maximize roadway’s resiliency to coastal
flooding and cliff erosion
•Supports Sea Level Rise Vulnerability Assessment
+ Climate Emergency Resolution
SOUTH CARLSBAD BOULEVARD
~City of
Carlsbad
SCOPE OF WORK
•Resiliency to coastal flooding, cliff erosion and
other sea level rise impacts
•Cliff erosion assessment
•Las Encinas Creek restoration analysis
•Assess eastward relocation of southbound lanes
of portion of south Carlsbad Blvd.
•Funding expires Feb. 2024
SOUTH CARLSBAD BOULEVARD
{__ City of
Carlsbad
•California Complete Streets Act
•General Plan Mobility Element
•Sustainable Mobility Plan
•Engineering Standards
•State of Emergency for Traffic Safety
•Climate Action Plan
•Sea Level Rise Vulnerability
Assessment
•Climate Emergency Resolution
CITY OF CARLSBAD POLICIES
l._ City of
Carlsbad
DIFFERENT STREETS =
DIFFERENT PRIORITIES
Project area
Arterial Streets
Identity Streets
VIiiage Streets
Neighborhood Connector Streets
Arterial Connector Streets
Coastal Streets
COASTAL STREET
Managing speeds Minimizing crossing
distances
Enhancing safety
for bikers
Reducing
greenhouse gas
emissions
•
WORK TO DATE
General Plan guiding principles
Physical, regulatory, capacity constraints
Las Encinas Creek restoration analysis
Cliff Erosion Assessment Report
Public input
Traffic study
SOUTH CARLSBAD BOULEVARD
PROJECT OPTIONS
Option 1: Four-lanes with traffic signals
SOUTH CARLSBAD BOULEVARD
Option 2: Two-lanes with roundabouts
Option 3: Two-lanes with roundabouts and an
enhanced pedestrian crossing OR a traffic signal
at Solamar Drive
City of
Carlsbad
Option 1 –Four lanes with traffic signals
Coastal Access
' coastal Hau rd
zone
Right of way Limit with
adj;ocent Class I and Sidewalk
Retain E.-isunc
Parking
coastal Access
North County Tr•n.slt District RR
Right of way limit with
adjacent Cl<lSS I and Sldewa lk
,
500'S,...
llrilll•
"complete Street" ro.clwoy
with sidewalks and bike lanes
Cl~s 1 shared path for pedestrians,
slower mo,ing mobifity options
Pedestrian Pathway
Retain ui.stinc
Parting
1tyof
Qrrlsbad
Option 2 –Two lanes with roundabouts
C:O.astal ACcess
CoilStal H=rd zone
Right of way Limit with
adjacent Cl-1 and Sidewalk
.,......_..:.
Reta, in Existinc
Parking
coastal Access
Right of Way Limit with
adjacent clilss I and Sidewa II<
500' Span
llriclc•
"COfflpl<K• StrHt" r~chway
with sidewilllls and bib lilMS
Las fncin.as Cfffk
Restornioft Ar.a
\ class 1 sha.red path for pedestrians,
\ slower moving molliflty options
' Pedestrian Pathway
Retain Existinc
Parting
1tyof
Qulsbad
Option 3 –Two lanes with roundabouts
and enhanced pedestrian crossing OR a
traffic signal at Solamar Drive
R4"talin Ellisti!IC
Parkioe
co~ul Access
Coasta I Haza rd
zone
Rir;ht of way limit with
adjacent Class I and Sidewalk
Re~in Ex5til1C
Parking
' coastal Access
oaan,.lew04'
-\ -
North County Transit District RR
Right of way limit with
adjacent cl;oss t and sidewalk
•complatlf Stl'fft" rNdway
with sid-allls and bite l;oMS
\ cl·au t shared use ~th tor pedestriains,
slower moving mobirity optioM
' Pedestrian P'Othway
... 3 ... j •
Ret. in Existing
Parkioe
1tyof
Qirlsbad
TRAFFIC STUDY
SOUTH CARLSBAD BOULEVARD
•Approach conforms with General Plan Mobility Element
•Considers future traffic volumes –SANDAG
•Analyzed whole length of south Carlsbad Boulevard
( C
(
MAXIMUM EXISTING CONDITIONS
Weekday
(Summer)
Weekend
(Summer)
Weekday (Fall)Weekend (Fall)
16k 23k 15k 16k
550 1,200 314 900
11 25 143 342
1919
AVERAGE SECONDS TO GET THROUGH INTERSECTION
(CARLSBAD BLVD. AND PALOMAR AIRPORT RD.)
0 10 20 30 40 50 60 70 80 90
Summer weekend Summer weekday Fall weekend Fall weekday
88%
Reduction in wait time
• • •
ROUNDABOUT SAFETY
43.7
%Less conflict
points
Reduction in
injuries
67%
90%
Reduction in
fatalities
35%
Reduction in
all crashes
SOUTH CARLSBAD BOULEVARD
v u
---------=
Solamar Drive(way) Concerns
•Speed
•Noise
•Safe passage of residents and hotel guests
•Entering/exiting vehicles
•Pedestrian crossings
•Improvements vs the bluff erosion
CHANGES BASED ON COMMUNITY INPUT
Retain Existing
\ Parking
Coastal Access
\ Coastal Hazard
Zone
Right of Way Limit with
adjacent Class I and Sidewalk
•
\
•
== z:::--
\_ Retain Existing
Parking
Coastal Access
--~--~~-----:---731--
CHANGES BASED ON COMMUNITY INPUT
• •
Coastal Hazard
Zone L...L.---------------
•
CHANGES BASED ON TRAFFIC STUDY AND INPUT
Retain Existing
\ Parking
Coastal Access
\ Coastal Hazard
Zone
Right of Way Limit with
adjacent Class I and Sidewalk
\
•
---
\_ Retain Existing
Parking
Coastal Access
--~--~-=--,------:-----r!J.,-----
1
THE COAST NEWS GROUP
THE C OAST N EWS I THE INLAND EDITION
""
Arlislit· n:!mlerinys uf Phw;e 1 uf lh<! Leucucliu S:rtt'!lsco.pl! Pru.fed. im:fo<.lilly the p:·upu:;ed ruumluU0ul aml railruml
,.mdt'1'J>tls.-: crossi:,~J at ,.;,• Pm·tnl SI ,·r.N. Cfmrtcsy Ph<,tO
OCEANSIDE
Oceanside plans
roundabouts, bike lanes
and pedestrian crossings
for Coast Highway
Cl
OPTIONS ANALYSIS
SOUTH CARLSBAD BOULEVARD
.
signal
Option 1 Satisfactory Satisfactory Safe Yes Yes Satisfact ory Satisfactory Satisfactory Traffic
Four lanes with signal
traffic signals
Option 2 Better Best Safest Yes Yes Best Yes Best Ro undabout
Two lanes with
roundabouts
Option 3 Best Better Safer Yes Yes Better Yes Bett,er Enha nced
Two lanes with pedestrian
hybrid intersection crossing,
control right t urn
onily exit
NEXT STEPS
•City Council –Summer 2023
•Finish grant deliverables -30% conceptual design of one
project option with climate adaptation incorporated
•Grant does not fund environmental analysis or construction
•Grant ends Feb. 2024
•No additional work included in the city’s FY 2022-23 or
2023-24 budgets
SOUTH CARLSBAD BOULEVARD
(._ City of
Carlsbad
RECOMMENDED ACTION
At the request of Beach Preservation
Commission Chair Steindlberger and
Commissioner Woolsey, consider
taking a position of preference on one
of the preliminary conceptual roadway
options for the South Carlsbad
Boulevard Climate Adaptation Project.
SOUTH CARLSBAD BOULEVARD
tyof
~lsbad
BACKUP SLIDES
SOUTH CARLSBAD BOULEVARD
OPTION 1 CROSS-SECTIONS
2' I t i)!'
PEm
1.Mi -
TYPCA1.
21J!' WDE a.JIS:s, 1
4' 'Z B'
~ .!:!!.
JYEY'..At 111WL1'1:0SSSIECTION
IN.T.S
ill'
RAV
'Z VM
/ p
~
l!IW
'l' 6' II,' ' 'J' lJ.5' 10.fi' "' 10Ji' 1-0.5' 3' 8' o' 8" z
UD Bll!1: -W -llli:E. LID VEltCI.E. VSOCLE ME.I>. I.GOClE VEHil.E Sll:EWAIJK
·=-=-· ~~~~~~~~~~·~;n --~:_____.-'\. ~--== 3t~o~
♦ ♦ -=D=-t ~ t ~
IYPIW B™W(AY PBO§S S§CTJCff
~HS
RiW
SOUTH CARLSBAD BOULEVARD
OPTION 1 CROSS-SECTIONS
VAR 'Z
I
?
)
II
R'N
2' 10' 12" J 6'
S1Da'i.w< IVISSIPATH LID
10' 12' s
SfilWM.il C:USSIPA.nl IIIEDWII
7
8'
lllt:E
R/l'i'
YAA I
3'
~
~
-
10.5' I
'1911Ct.£
B' 3 10.S
BM£ ~I w.:llE
• ' ?%
116'
I?
um
t
IDT
!0.5' 4' 10.5"
lit),jQ.E. I.ED. 119ilel.E
♦ -t 2"
TYl'l:Al BRIDGE CROSS SECTION ru.s
10.5" 3'
1/9!0.f Bl.ff
t
10.S
w.:llE
t
B'
Etl(E
:r 8' 8' I 'Z YAA
!lUFF BiliE SOEWIJ.K I
• •
•
-,--
11 -L 11 2" VAR I
R,W
LL) SDFw.r.ul I
SOUTH CARLSBAD BOULEVARDOPTION 1
Retain Existing
\-,:ast: Hazar~ --------
Zone
Right of Way Limit with
adjacent Class I and Sidewalk
•
Coastal Acces
\ Parking
,.,.-, Coastal Access _________ ~----------------~---------u,,...,;;_~ ___ ..__ _____________ _
SOUTH CARLSBAD BOULEVARDOPTION 1
oceanview Dr
Avenida Encinas
North County Transit District RR
Right of Way Limit with
adjacent Class I and Sidewalk
-----
\ Class 1 shared path for pedestrians,
slower moving mobility options
Pedestrian Pathway
Retain Existing
Parking
•
SOUTH CARLSBAD BOULEVARD
Option 2: 2-lane road w ith roundabouts
Legend:
1==::J Proposed Class I Trail
-Proposed Pedestrian Pathway
-Propo..'Bd Roadway
I Proposed Bridge
l=::::J Coastal Hazard Zone
l==::J Landscape Areas
Property Lina
eout~ Ac(tiS
COHti'IHiiZilrd
ZOIM!
Right of w1y limit with
adjaicent Class I iind Sidewalk
.._ =..:..:.
\ ·, llflain caistinc
Porki~c
COISUI Access
North County Tn11uit District RR
Aicht of w~ Lim.it with
1djKtnt CliHS 11nd Side.wJa
us fncM CrHk
lltitorMionArel
•comp1e1e Street" roidw1y
with-lftd bil<t~MS
Class 1 shilred p,th to, pedestria.ns,
$lower movinc: mobility options
Pede-strian ~thw-iy
Ret~n Existinc
.. r1u~
SOUTH CARLSBAD BOULEVARD
OPTION 2 CROSS-SECTIONS
2'
36'
TYPICAL
20' WIDE CLASS 1
10' 4' 2' 8'
PED
1.5% ~
TYPICAL TRAIL CROSS SECTION
N.T.S
8'
R/W
2' 6' 8'
LID BIKE
• R /W
2' VAR
3'
UF
2%
73'
10.5' 4' 10.5'
VEHICLE MEO. VEHICLE
~ t 2%
TYPICAL ROADWAY CROSS SECTION
N.T.S
3' 8' 8' 8' 2' VAR R/W
UF BIKE LIO SIDEWALK
•
SOUTH CARLSBAD BOULEVARD
OPTION 2 CROSS-SECTIONS
'
I
w
2' 10'
SIDEWALK
R/W
VAR 2'
J
I~
L
!12' I
ClASS I PATH
10' 12'
I SIDEWALK a.ASS I PATH
7
6' 8' 3'
LID B'IKE BUFF
6t
S'
VIEDIAN
aARRIEF
86'
8' 3' 10.5' 4'
BIKE auFF VEHICLE MEO.
• J 2% ..----
TYPICAL BRIDGE CROSS SECTION
N.T.S
95'
10 5' 4' 10 S' 3'
VEHICl:E MED. VEHICLE l:UJFF
* t
10.S' 3'
VEHICLE auFF
t 2% -
BIKE
Jg
2% 2% /71--==· ====::::::::::=:========:::::i~t:===============::=30E======-=======:::::::===:::i
R/W
8' 8' I 2' VAR
BIKE SIDEWALK I
• (
I
,
J
8' 8' 2' VAR R/W
LID SIDEWALK
SOUTH CARLSBAD BOULEVARDOPTION 2 u
r
Avenida Encinas
North County Transit District RR
----------
\ Right of Way Limit with
adjacent Class I and Sidewalk
SOO'Span
Bridge
/
Las Encin
Restorati
\ "Complete Street" roadway
\ with sidewa~s and bike lanes
Class 1 shared path for pedestrians,
slower moving mobility options
Pedestrian Pathway
Retain Existing
Parking
u
SOUTH CARLSBAD BOULEVARD
l
Option 3 : 2-lane road w ith roundabouts and one enhanced pedest ria n crossing
legend:
l==::J Proposed Class I Trail
-Proposed Pedestrian Pathway
-Proposed Roadway
I Proposed Bridge
C=::J Coast91 Hazard Zone
l==::J landscape Areas
Propeny Line
Aetilin tldstinc
Pilrki:ng
cont.I Access
Co:asti.l Hillard
ZCM
Right of w ay limit with
adjiice.nt class I and sidewailk
\ Ret1.in EXistin1
hrkinc
' coastal Access
O<H1,.lew or
Nonh C0Unty Tran.it Dbtrict RR
Right of w-.y Limit with
•djxent Closs I •nd Sidewol-
5"'Span ... "Complete St,_. .-.y
with sicMw~ -Iii-• Ines
--
dus 1 shared use ~ch for pedestr~ns,
slower moving mobility options
Pedestrian PilthWilY
l ,,
j •
Retain Existinc
Parkinc
OPTION 3 SOUTH CARLSBAD BOULEVARD
-
Avenida Encinas
North County Transit District RR
SOO'Span
Bridge
\ "Complete Street" roadway
\ with sidewalks and bike lanes
~==-'~~~~\ ~,----,.
----~ ----------·-----~ --
----------CarlsbadBlvcr ____ ---, , r Las Encinas Creek
/ Restoration Area -----~~::::-------------~-=~~--------------
\_ Right of Way Limit with
adjacent Class I and Sidewalk \ Class 1 shared use path for pedestrians,
slower moving mobility options
Pedestrian Pathway
Retain Existing
Parking
u
SOUTH CARLSBAD BOULEVARDOPTION 3 CROSS-SECTIONS
QS'
RJW VAA RIW 12" ta 12' FJ 8 10.5' 4' t0.5' 8' 8' 8' 'l
-SIDEWJ\I.JK CUSS I PATH LE DE WHx:t..f 1£D_ VEHD.E BIKE UID SIJE'llALK
di, t t .H, ~ -1!..
n
' VAA IRNI 2 6' 8' l \O.S' .,. 10.S ! 8' 6' 8' 2'
IL[) BIKE LIFF YEHICll MED. VElilOI.E ff, BIKE LID SIEYAU<.
• f t ' ~ 2%
SOUTH CARLSBAD BOULEVARD
OPTION 3 CROSS-SECTIONS
2' 10'
PED
1.5% -
f
36'
TYPICAL
20' WIDE CLASS 1
4' 2' 8'
1.5%
TYPICAL TRAIL CROSS SECTION
N.T.S
8'
R/W
R/W
2' VAR
~
VAR 2' 10'
I SIDEWALK
J
L
7
I
12' 5' 8'
CLASS I PATH MEDIAN/ BIKE
BARRIER
Jo
TYPICAL BRIDGE CROSS SECTION
N.T.S
86'
3' 10.5' 4' 10.5' 3'
BUFF VEHICLE MED. VEHICLE BUFF
~ t 2% 2% -,---------, -
8' 8' I
BIKE SIDEWALK I
Jo
'
'
0
2'
)
-
R/W
VAR
PLAN
NORTH
ffi
200'