HomeMy WebLinkAbout2023-09-05; Traffic and Mobility Commission; ; All-Way Stop control at the intersection of Madison Street and Oak AvenueMeeting Date: Sept. 5, 2023
To: Traffic and Mobility Commission
Staff Contact: Lindy Pham, Associate Engineer
Lindy.Pham@carlsbadca.gov or 442-339-2768
Miriam Jim, Senior Engineer
Miriam.Jim@carlsbadca.gov or 442-339-5796
Subject: All-Way Stop control at the intersection of Madison Street and Oak
Avenue
Recommended Action
Support staff’s recommendation to install an All-Way Stop at the intersection of Madison Street
and Oak Avenue.
Background
Madison Street and Oak Street are classified as Village Street in the City’s General Plan Mobility
Element. They are located in the northwest quadrant of the city, generally known as the Village
and Barrio communities. Both streets have a posted speed limit of 25 miles per hour, or mph.
The surrounding land uses include residential and commercial along both streets.
The intersection of Madison Street and Oak Avenue is side-street stop-controlled on Oak
Avenue. The roadway width on Madison Street north of the intersection measured 60 feet from
curb to curb, which accommodates a single travel lane, a bike lane and a parking lane in the
northbound direction and a single travel lane with sharrow markings and marked angle parking
in the southbound direction. To the south of the intersection, the width of the roadway reduces
to 48 feet and accommodates a single travel lane, a bike lane and a parking lane in each
direction. Oak Avenue has a roadway width of 48 feet and accommodates a single travel lane
and on-street parking in each direction.
Residents have expressed concerns about navigating this intersection from Oak Avenue due to
limited sight distance and have requested All-Way Stop control at the intersection. City staff
who work at the Public Works yard located at 405 Oak Avenue and use this intersection on a
daily basis have also expressed concerns about crossing Madison Street at this intersection due
to limited sight distance available. This report summarizes the results of the multi-way stop
analysis conducted at the intersection of Madison Street and Oak Avenue.
Discussion
Sept. 5, 2023 Item #2 Page 1 of 7
In response to requests for an All-Way Stop at the intersection of Madison Street and Oak
Avenue, a multi-way stop analysis was performed per the guidelines found in the California
Manual on Uniform Traffic Control Devices, or CA MUTCD. Multi-way stop analysis considers
vehicular, pedestrian and bike volumes as well as other factors such as sight distance,
movement conflicts, and traffic operation to determine if multi-way stop control is justified at a
particular intersection. The CA MUTCD multi-way stop criteria and corresponding analysis
results for the intersection of Madison Street and Oak Avenue are summarized below.
Criteria A of the CA MUTCD multi-way stop criteria allows consideration of a multi-way stop as
an interim measure prior to installation of a traffic signal.
A traffic signal at the intersection of Madison Street and Oak Avenue is not planned or
programmed in the city’s Capital Improvement Program, therefore Criteria A was not satisfied.
Criteria B allows for consideration of a multi-way stop when there have been five or more
reported collisions within a 12-month period that are susceptible to correction by a multi-way
stop.
A review of the collision history between January 2018 and November 2022 revealed no
reported collisions at the intersection of Madison Street and Oak Avenue. Therefore, Criteria B
was not satisfied.
Criteria C evaluates the traffic volumes to determine if a multi-way stop can be considered.
Criteria C is satisfied if 1) the average volume on a major street, in this case Madison Street, is
at least 300 vehicles per hour for any 8 hours of an average day; and 2) the combined vehicular,
pedestrian and bicycle volumes entering the intersection from the minor street, in this case Oak
Avenue, averages at least 200 units per hour for the same 8 hours.
Table 1 summarizes the traffic volumes collected at the intersection of Madison Street and Oak
Avenue on Tuesday, Dec. 6, 2022. Based on the average traffic volumes presented, the
minimum traffic volumes in Criteria C were not satisfied.
Table 1. Average Traffic Volumes on Tuesday, December 6, 2022
Intersection
Average Veh.
Volume on Major
Street, Madison St
(300 or more)
Average Volume on
Minor Street, Oak
Avenue, Veh., Peds
and bikes combined
(200 or more)
Meet both
Average
Volume
thresholds?
Madison Street at Oak Avenue 123 150 NO
Criteria D allows consideration of a multi-way stop where no single criterion is satisfied but
where Criteria B and C are satisfied to 80 percent of the minimum values.
Since Criteria B results indicate zero qualifying collisions and the reduced minimum value for
Criteria C of 160 is not met, Criteria D was not satisfied.
Sept. 5, 2023 Item #2 Page 2 of 7
In addition to the four criteria listed above, the CA MUTCD includes optional criteria which can
also be considered. The optional criteria are described as:
A.The need to control left-turn conflicts;
B.The need to control vehicle/pedestrian conflicts near locations that generate high
pedestrian volumes;
C.Locations where a road user, after stopping cannot see conflicting traffic and is not able
to negotiate the intersection unless conflicting cross traffic is also required to stop; and
D.An intersection of two residential neighborhood collector (through) streets of similar
design and operating characteristics where all-way stop control would improve traffic
operational characteristics of the intersection.
Staff reviewed the optional criteria for the subject intersection and determined that Option C
was satisfied. Table 2 summarizes the minimum and available Intersection Sight Distance, or
ISD, at the intersection.
Table 2: Intersection Sight Distance (ISD) on Madison Street at Oak Avenue
Minor
Street
Approach
Left Turn Right Turn
Minimum
ISD*
Available
ISD
Meet ISD
Requirement?
Minimum
ISD*
Available
ISD
Meet ISD
Requirement?
Oak Ave
(EB) 280’ 235’ NO 240’ 152’ NO
Oak Ave
(WB) 280’ 430’ YES 240’ 245’ YES
*Per California Highway Design Manual for roadway with speed limit of 25 mph
Figure 1 shows the line of sight from eastbound Oak Avenue onto Madison Street. The available
sight distance on Oak Avenue traveling eastbound did not meet the minimum sight distance
requirements due to the existing angle parking on the west side of Madison Street, north of the
intersection, and the parallel parking lane south of the intersection.
Figure 1: Line of Sight on Eastbound Oak Avenue to Madison Street
Eastbound Oak Avenue looking north on Madison Street Eastbound Oak Avenue looking south on Madison Street
Sept. 5, 2023 Item #2 Page 3 of 7
In order to provide the minimum sight distance for eastbound traffic on Oak Avenue, eight
parking spaces on Madison Street, six angle parking stalls north of the intersection and two
parallel parking spaces south of the intersection, would need to be removed. With the
increasing demand for parking in the Village and Barrio communities, staff do not support
removal of on-street parking at this location.
Based on staff findings, which are consistent with the recommendations found in the
CA MUTCD, staff recommend the installation of All-Way Stop control at the intersection of
Madison Street and Oak Avenue.
Necessary Council Action
The City Council must adopt an ordinance to establish an All-Way Stop control at the
intersection of Madison Street at Oak Avenue.
Next Steps
Upon receiving support from the Traffic and Mobility Commission, staff will introduce an
ordinance to establish an All-Way Stop control at the intersection of Madison Street and Oak
Avenue for City Council adoption. Once an ordinance is adopted, staff will issue work orders to
install STOP signs and pavement markings at the intersection in compliance with the CA
MUTCD.
Exhibits
1.Location Map
2.CA MUTCD Multi-Way Stop Criteria Worksheet
Sept. 5, 2023 Item #2 Page 4 of 7
1
LOCATION MAP
Sept. 5, 2023 Item #2 Page 5 of 7
California MUTCD 2014 Edition (FHWA’s MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) Page 1 of 2
Chapter 2B – Regulatory Signs, Barricades, and Gates February 15, 2022 Part 2 – Signs
MULTI-WAY STOP CRITERIA
Transportation Department, City of Carlsbad
CALC MB DATE 1-26-2023
CHK DD DATE
Major St: Madison Street Critical Approach Speed 25mph mph
Minor St: Oak Avenue Critical Approach Speed mph
Critical speed of major street traffic > 40mph RURAL (R) Otherwise URBAN (U)
The decision to install multiway stop control should be based on an engineering study. The following criteria should be considered in the engineering study for multiway stop sign installation:
Criteria A - Interim Traffic Control Measure SATISFIED YES NO
Where traffic control signals are justified, the MULTI-WAY STOP is an interim measure that can be installed quickly to control traffic while arrangements are being made for the installation of the traffic control signal.
Criteria B - Accident Experience SATISFIED YES NO
Five or more reported crashes within a 12-month period that are susceptible to correction by a MULTI-WAY STOP installation. Such crashes include right-turn and left-turn collisions as well as right-angle collisions.
Criteria C - Minimum Traffic Volumes SATISFIED YES NO (All Parts C.1, C.2a and C.2b below must be satisfied)
C.1 Major Street Vehicular Volume Yes No
U R 10AM 11AM 12PM 1PM 2PM 3PM 4PM 5PM Hour
Both Approaches Major Street 300 210 99 119 133 135 147 106 135 106 Average= 123
C.2 a. Minor Street Vehicular, Pedestrian & Bicycle Volume Yes No
U R 10AM 11AM 12PM 1PM 2PM 3PM 4PM 5PM Hour
Both Approaches Minor Street 200 140 117 116 171 138 132 171 199 158 Average= 150
b.Minor Street Vehicle Delay Yes No N/A
Peak Hour Peak Hour Volume Minimum Delay Requirement, seconds per vehicle Average Delay, seconds per vehicle 30 seconds
Criteria D – Combination of Criteria SATISFIED YES NO
REQUIREMENT CRITERIA FULFILLED
THREE CRITERIA SATISFIED 80%
B. Four or more reported crashes within a 12-month period.Yes No
C.1. Major Street Volume of at least 240 vehicles per hour Yes No
C.2. Minor Street Volume of at least 160 units per hour Yes No
Exhibit 2
Sept. 5, 2023 Item #2 Page 6 of 7
California MUTCD 2014 Edition (FHWA’s MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) Page 2 of 2
Chapter 2B – Regulatory Signs, Barricades, and Gates February 15, 2022 Part 2 – Signs
MULTIWAY STOP CRITERIA
Transportation Department, City of Carlsbad
Major St: Madison Street Critical Approach Speed 25mph mph Minor St: Oak Avenue Critical Approach Speed mph
Other criteria that may be considered in an engineering study include:
Option A – Left Turn Conflicts SATISFIED YES NO
The need to control left-turn conflicts;
Option B – Vehicle/Pedestrian Conflicts SATISFIED YES NO
The need to control vehicle/pedestrian conflicts near locations that generate high pedestrian volumes;
Option C – Sight Distance SATISFIED YES NO
Locations where a road user, after stopping, cannot see conflicting traffic and is not able to negotiate the intersection unless conflicting cross traffic is also required to stop; and
Option D – Residential Street SATISFIED YES NO
An intersection of two residential neighborhood collector (through) streets of similar design and operating characteristics where multi-way stop control would improve traffic operational characteristics of the intersection.
Sept. 5, 2023 Item #2 Page 7 of 7
September 2023 Traffic and Mobility Commission Mee�ng Ques�ons by Pete Penseyres
Agenda Item 2: Stop signs on Madison at Oak Street
Ques�ons:
1.
2.
3.
4.
What other alterna�ves have been considered beyond removing parking spaces to eliminate the
sight distance issue?
What kind of public outreach to explain the proposal was done in the neighborhood?
Will other intersec�ons in this neighborhood that lack all way stops and have parking also be
studied for sight distance issues?
Item 3 on the Agenda proposes removing stop signs from the Residen�al Traffic Calming Program
based on the following statement: “Unwarranted stop signs can lead to unintended consequences,
such as non-compliance, increase in speed between intersec�ons, and noise and air pollu�on.”
What types of unintended consequences been considered and discussed/communicated with the
police and other stakeholders?
Lindy Pham, Associate Engineer Engineer, City of Carlsbad
Miriam Jim, Senior Engineer, City of Carlsbad
Sept. 5, 2023
All-Way Stop at Madison Street and Oak Avenue
RECOMMENDED ACTION
Support staff’s recommendation to install an All-Way
Stop at the intersection of Madison Street and Oak
Avenue.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
BACKGROUND
•Residents have expressed concerns
about insufficient sight distance at
the intersection of Madison St/Oak
Ave
•City staff who work at the Public
Works yard on Oak Avenue have also
expressed similar concerns
•All-Way stop control has been
requested
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
•Park Drive
•Hummingbird Road
•Black Rail Road
•Plum Tree Road
•Carrillo Way
TRAFFIC CALMING STREETS
Madison Street and Oak Avenue
•Classified as Village Street
•In the Village and Barrio
•Speed Limit of 25 MPH
•Surround land uses include residential and
commercial
ALL-WAY STOP
•Staff utilized criteria found in the California Manual on Uniform Traffic Control Devices (CA MUTCD) to determine whether an All-Way STOP would be appropriate
•Key factors considered include:
–Vehicular, bike and pedestrian volumes
–Collision history
–Movement conflicts
–Sight distance
–Traffic operations
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
CRITERIA A -INTERIM MEASURE
•Criteria A –Where traffic control signals are justified, the multi-way stop is an
interim measure that can be installed quickly to control traffic while
arrangements are being made for the installation of the traffic control signal.
A traffic signal at the intersection is not planned or programmed
in the City’s Capital Improvement Program at Madison St/Oak Ave,
therefore Criteria A was not satisfied.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
CRITERIA B -COLLISION HISTORY
•Five or more reported crashes in a 12-month period that are susceptible to
correction by a multi-way stop installation. Such crashes include right-turn and
left-turn collisions as well as right-angle collisions.
A review of the collision history between January 2018 and November 2022
revealed no reported collisions at the intersection of Madison St/Oak Ave,
therefore, Criteria B was not satisfied.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
CRITERIA C –MINIMUM VOLUMES
Criteria C -Minimum volumes:
1.Average volume on a major street is at least 300 vehicles per hour for any
8 hours of an average day; and
2.The combined vehicular, pedestrian, and bicycle volume from the minor
street averages at least 200 units per hour for the same 8 hours.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
CRITERIA C-MINIMUM VOLUMES
Average Traffic Volumes based on counts collected on Tuesday, Dec. 6, 2022
Intersection
Average Veh.
Volume on Major
Street, Madison St
(300 or more)
Average Volume on
Minor Street, Oak
Avenue, Veh., Peds
and bikes combined
(200 or more)
Meet both
Average
Volume
thresholds?
Madison Street at Oak Avenue 123 150 NO
Criteria C was not satisfied.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
CRITERIA D –80% MINIMUM VOLUMES
Where no single criterion is satisfied, but where Criteria B, C.1, and C.2 are all
satisfied to 80 percent of the minimum values. Criterion C.3 is excluded from
this condition.
Since Criteria B results indicate zero qualifying collisions and the reduced
minimum value for Criteria C of 160 is not met, Criteria D was not satisfied.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
OPTIONAL CRITERIA
A.The need to control left-turn conflicts;
B.The need to control vehicle/pedestrian conflicts near locations that generate high pedestrian volumes;
C.Locations where a road user, after stopping cannot see conflicting traffic and is not able to negotiate the intersection unless conflicting cross traffic is also required to stop; and
D.An intersection of two residential neighborhood collector (through) streets of
similar design and operating characteristics where multi-way stop control
would improve traffic operational characteristics of the intersection.
ITEM 2: AWITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
SIGHT DISTANCE
Minor
Street
Approach
Left Turn Right Turn
Minimum
ISD*
Available
ISD
Meet ISD
Requiremen
t?
Minimum
ISD* Available ISD Meet ISD
Requirement?
Oak Ave
(EB)280’235’NO 240’152’NO
Oak Ave
(WB)280’430’YES 240’245’YES
ISD –Intersection Sight Distance
*Per California Highway Design Manual for roadway with speed limit of 25 mph
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
LINE OF SIGHT
Eastbound Oak Avenue looking north on Madison Street
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
LINE OF SIGHT
Eastbound Oak Avenue looking south on Madison Street
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
PARKING REMOVAL
6 Parking Stalls 2 Parking Spaces
Oa
k
A
v
e
Madison St
•To provide sufficient
sight distance, removal
of 8 parking spaces on
Madison St is required
•Staff does not support
parking removal due to
high demand for
parking in the area
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
OPTIONAL CRITERIA C
Locations where a road user, after stopping cannot see conflicting traffic and is
not able to negotiate the intersection unless conflicting cross traffic is also
required to stop
Based on the sight distance evaluation performed,
staff determined that Option C was satisfied.
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
CONCLUSION
•Based on the findings presented, staff recommends
installation of an All-Way Stop at the intersection of
Madison Street and Oak Avenue
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
RECOMMENDED ACTION
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue
Support staff’s recommendation to install an All-Way
Stop at the intersection of Madison Street and Oak
Avenue.
NEXT STEPS
•City Counsel to adopt Ordinance to establish an
All-Way Stop at the intersection of Madison St and
Oak Ave
•Once ordinance is adopted, STOP signs and
pavement markings will be installed at the
intersection
ITEM 2: ALL-WAY STOP at Madison Street and Oak Avenue