HomeMy WebLinkAbout2020-01-06; Traffic and Mobility Commission; ; AVENIDA DIESTRO, ESTRELLA DE MAR ROAD AND CADENCIA STREET TRAFFIC CALMINGItem # 2
Meeting Date:
Jan. 6, 2020
To: Traffic and Mobility Commission
Staff Contact: Lindy Pham, Associate Engineer
Lindy.Pham@Carlsbadca.gov or 760-602-2768
Subject: Traffic calming plans for Avenida Diestro, Estrella De Mar Road and
Cadencia Street.
Recommended Action
Based on the findings contained in this report and the requirements of the Carlsbad Residential Traffic Management Program, staff recommends that Traffic and Mobility Commission support the proposed traffic calming plans on Avenida Diestro, Cadencia Street and Estrella De Mar Road.
Background
The Carlsbad Residential Traffic Management Program (CRTMP) was approved by City Council in
2001 and was revised in 2011. This program was designed to address speeding on residential
streets. The program is a three-phase process, which offer solutions at increasing levels of cost
and complexity. The first phase is initiated when a concerned resident contacts the City. This
phase focuses on education and enforcement solutions and utilizes measures such as installation
of speed limit signs, pavement legends and working with the police department to provide
enforcement based on their availability.
Phase II utilizes cost-effective traffic management devices such as speed cushions, traffic circles,
high-visibility crosswalks and signs to help reduce speeds on neighborhood streets. The
measured critical speed, otherwise known as the 85th percentile street, must be at least 32 miles
per hour (mph) to be eligible for Phase II consideration. The Phase II process utilizes public input
to establish community support before a proposed traffic calming plan can be implemented. This
report describes three streets that are currently in the Phase II process.
Data
In response to speeding concerns, staff deployed the portable speed feedback signs on Avenida
Diestro, Cadencia Street and Estrella De Mar Road (Exhibit 1). The measured criteria speeds for
each of these streets are summarized in Table 1.
Table 1: Measured Critical Speed
STREET STREET LIMITS CRITICAL SPEED
Avenida Diestro Circulo Sequoia to Sitio Baya 33 mph
Cadencia Street La Costa Ave to Del Rey Ave 37 mph
Estrella De Mar Road Poinsettia Lane to approximately 600’ south of Olivine Court 30 mph
The critical speeds measured on Avenida Diestro and Cadencia Street exceeded the required 32
mph and were found to be eligible for Phase II of the CRTMP. The critical speed measured on
Estrella De Mar Road was below the threshold for Phase II. However, the Traffic and Mobility
Commission granted an exception for Estrella De Mar Road to be considered for Phase II at its
meeting on Dec. 5, 2016.
Per the CRTMP Phase II process, staff invited residents within the study area to neighborhood
meetings to discuss traffic calming strategies and to receive feedback from residents on the
various concept plans staff developed to address speeding concerns. Details of the neighborhood
meetings on the three subject streets are summarized in Table 2.
Table 2: Neighborhood Meetings
STREET Meeting Date Meeting Location No. of Attendees
Avenida Diestro July 11, 2019 City Library (Dove) 29
Cadencia Street October 24, 2019 Faraday Center 6
Estrella De Mar Road August 1, 2019 Faraday Center 9
Based on the feedback received from at the neighborhood meetings, a preferred traffic calming
plans was selected by the attendees at the three neighborhood meetings. For Avenida Diestro, a
traffic calming plan consisting of four speed cushions was selected. For Cadencia Street, a plan
consisting of two speed cushions was selected. The residents on Cadencia Street also requested
a right edge striping to be incorporated into the traffic calming plan. For Estrella De Mar Road, a
preferred traffic calming plan consisting of five speed cushions was selected by majority of the
meeting attendees.
After the meetings, letters were sent to the residents and property owners with proposed
features directly in front of their homes. This gives residents and property owners the
opportunity to express any specific concerns and for staff to make any adjustments to the
concept plan, if necessary. Based on the comments received, the preferred traffic calming plan
for each street was finalized (see Exhibits 2,3 and 4).
The CRTMP requires that the majority of the residents and property owners within the study
must support the plan as determined by a mailed survey. The survey is considered valid if 50%
or more of the residents and non-resident owners return the completed survey. Positive support
for the plan is indicated by 67% or more of the returned surveys in support of the proposed plan.
The survey results for each of these streets are summarized in Table 3.
Table 3: Survey Results
STREET Total No. of
Survey Sent
Total No. of
Survey
Returned
Return
Rate
Total No.
of
Support
Support
Rate
Met
Support
Criteria?
Avenida Diestro 63 43 68% 34 79% Yes
Cadencia Street 10 7 70% 7 100% Yes
Estrella De Mar Road 77 53 69% 50 94% Yes
The surveys for all three streets have met the criteria specified in the CRTMP, therefore staff
recommends the approval of the traffic calming plans for Avenida Diestro, Cadencia Street and
Estrella De Mar Road.
Necessary Council Action
City Council approval required for the traffic calming plans for Avenida Diestro, Cadencia Street
and Estrella De Mar Road.
Next Steps
Staff will work with consultant to develop the final traffic calming plans.
Exhibits
1. Location Map
2. Avenida Diestro Traffic Calming Plan
3. Cadencia Street Traffic Calming Plan
4. Estrella De Mar Road Traffic Calming Plan
EXHIBIT 1
LOCATION MAP
PROJECT LOCA T/ON
~ 1. Avenida Diestro
2. Cadencia Street
3. Estrella De Mar Road
NOT TO SCALE
Traffic Calming EXHIBIT
A venida Diestro, Cadencia Street & Estrella De Mar Road 1
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1
Memorandum
January 6, 2020
To: Honorable Mayor Hall and Members of City Council
From: Traffic and Mobility Commission
Re: Regional Traffic Calming Practices
Background
At the 11/19/2019 City Council meeting, a minute motion passed to have the “Regional Traffic Calming
Practices” item of business presented to our commission with the opportunity to provide
recommendations and comments in the form of a memorandum. The commission addressed the item at
our 12/2/2019 meeting, for which staff provided a report, a presentation, and written answers to a
series of pre-submitted questions.
The Carlsbad Residential Traffic Management Program (CRTMP) addresses traffic calming only on streets
with the “Local/Neighborhood Street” (residential) typology. While there is no formal protocol for all of
the other (non-residential) street typologies, staff indicated that they are open to developing one.
Commission recommendations
The commission recommends that the City Council have staff formalize a protocol based on best
practices for identifying and prioritizing traffic calming measures on non-residential streets. For
consistency with the General Plan Mobility Element, the protocol should:
• Acknowledge that some street typologies, such as Arterial Streets and Arterial Connector
Streets, are not ideal candidates for traffic calming, because they are expected to carry larger
volumes of vehicles at higher speeds, although special considerations can be made for streets in
close proximity to schools.
• Identify other street typologies, such as Identity Streets and School Streets, which are better
candidates for traffic calming, because they generally are expected to carry lower vehicle
volumes and encourage non-vehicle travel.
• Establish objective criteria for identification and prioritization of candidate Capital Improvement
Program (CIP) projects, including confirmation of the safety concern through data
collection/analysis.
The commission further recommends that the City Council endorse and track the status of the following
traffic calming-related initiatives that Staff has indicated are currently in progress:
• Study of non-residential traffic calming programs from neighboring agencies.
• Implementing an annual reporting/monitoring system that includes collision data.
• CRTMP program and website updates, including public project tracking capability.
2
Information from Staff and Commission Discussion
CRTMP—traffic calming on residential (neighborhood/local) streets
• The program has been active since 2001, but the first eight Phase II projects were completed in
the 2010-2013 timeframe.
• The program was on hold from 2014-2016, so Phase II projects that were in the queue were
delayed for an extended period, leading to some resident dissatisfaction.
• The program was restarted in 2017, and four of the on-hold Phase II projects were completed in
2018, while nine additional Phase II projects are scheduled for implementation in 2020.
• Due to the success of the Phase II projects, no Phase III projects have been necessary, and no
projects have been removed. (A traffic circle pilot project on Cassia Road was removed, but that
was not a CRTMP project.)
• Phase II projects are normally prioritized based on dates of concerns received from residents,
although other factors can affect scheduling.
• Staff summarized residential traffic calming programs in neighboring agencies and pointed out
that several of them had modeled their programs after the CRTMP.
• The CRTMP was last updated in 2011, and staff is evaluating the program for a possible update
based on resident feedback and the types of Phase II projects that have been successful.
Based on State guidance, staff proposes removing stop signs from the program. Staff is also
working to make project information available on the city’s website to improve
communication with residents.
Traffic calming on non-residential streets
• Projects can be identified, scoped, and budgeted during the City Council’s annual Capital
Improvement Program (CIP) process.
• In addition, residents can request investigation of potential projects, but, unlike the CRTMP for
residential streets, there is currently no formal process.
• Staff is open to developing a formal process, but they are not proposing one at this time.
• Although staff reported that four of the neighboring agencies (Encinitas, Oceanside, San Diego,
and Solana Beach) had non-residential traffic calming programs, they did not analyze them, but
they have agreed to follow up on the recommendation to do that.
• During commission work plan development, a proposal was made for staff to develop methods
for periodic safety monitoring studies based on collision data to identify candidates for safety
improvements, analogous to the annual “level of service” monitoring. That was not included in
the commission’s final work plan, because the City Council had not included it in the current
scope of work. However, staff is now proposing an annual collision data report as a priority in
the upcoming year.