HomeMy WebLinkAbout2016-12-05; Traffic Safety Commission; ; Information Only - Cassia Road Traffic Calming
CITY OF CARLSBAD
TRAFFIC SAFETY COMMISSION
STAFF REPORT
COMMISSION MEETING OF: December 5, 2016 ITEM NO. 6C-1
Page 1
LOCATION: Cassia Road Traffic Calming
INITIATED BY: Eric Osterberg
1710 Fairlead Ave
Carlsbad, CA 92011
STAFF RECOMMENDATION: Information Only
BACKGROUND:
Staff has heard various traffic concerns on Cassia Road between Poinsettia Lane and El
Camino Real and has been working with residents to address those concerns. Cassia
Road serves as a highly traveled connection between Poinsettia Lane and El Camino
Real. The concerns reported to staff included high speeds on Cassia Road as well on the
90 degree turn at Poinsettia Lane, the presence of and excessive noise from oversize
trucks, and the lack of available pedestrian crossings. Staff has implemented various
improvements to address these concerns and is currently implementing a traffic calming
plan for the corridor that utilizes performance-based practical design elements including
cost-effective traffic circles.
DATA:
Cassia Road is classified as a Local/Neighborhood Street according to the Mobility
Element of the Carlsbad General Plan. It serves as the existing connection for eastbound
and westbound traffic traveling between Poinsettia Lane and El Camino Real (See Exhibit
1). According to the Mobility Element, Poinsettia Lane is classified as an Arterial
Connector Street in the proximity of Cassia Road, while El Camino Real is classified as an
Arterial Street. Although Cassia Road is classified as a Local/Neighborhood Street, the
unconstructed section of Poinsettia Lane between Cassia Road and Skimmer
Court/Oriole Court diverts traffic to Cassia Road and as a result, it functions as an
Arterial Connector.
Cassia Road has a curb-to-curb width of 40 feet. The roadway is fully improved with
curb, gutter, sidewalk and street lights on both sides of the road. The roadway is striped
with painted centerline and a bike lane in each direction. Parking is currently prohibited
on both sides of Cassia Road. The speed limit on Cassia Road between EL Camino Real
and Poinsettia Lane is currently posted at 35 miles per hour. The speed zone is based on
a valid Engineering and Traffic Survey conducted in 2013. There are approximately 8,000
vehicles a day that travel on Cassia Road between Poinsettia Lane and El Camino Real.
CITY OF CARLSBAD
TRAFFIC SAFETY COMMISSION
STAFF REPORT
COMMISSION MEETING OF: December 5, 2016 ITEM NO. 6C-1
(continued)
Page 2
In response to reported concerns of the 90 degree curve on Poinsettia Lane at Cassia Road,
staff has completed the following improvements:
Reconfiguration of the eastbound left turn on Poinsettia Lane at Cassia
Road
Curve warning signs and speed advisory plates (15 mph) for each
direction of travel
Concrete barriers installed along the outside of the curve
Bike lanes and pedestrian travel routed behind concrete barriers to
provide protection for bicyclists and pedestrians
In response to concerns about vehicle speeding on Cassia Road, staff has completed the
following improvements:
Vehicle lane narrowing via installation of bike lanes in both directions
“35” pavement legends installed to augment posted speed limit signs
Two permanent speed feedback signs installed, one for each direction of
travel
In response to concerns about excessive noise from oversize trucks on Cassia Road, staff has
completed the following improvements:
Installation of truck prohibition signs on Cassia Road, Poinsettia Lane and
El Camino Real
Police Department notification of companies in violation of truck
prohibition
On August 9, 2016, city staff met with residents to discuss on-going concerns about speeding on
Cassia Road. At this meeting, staff committed to preparing a traffic calming plan for Cassia
Road using cost-effective traffic calming measures such as painted traffic circles, similar to what
was implemented on Kelly Drive in the vicinity of Kelly Elementary School.
Key objectives of the proposed traffic calming plan include 1) lowering speeds on the corridor
by introducing traffic calming features at regularly-spaced intervals, 2) not penalizing drivers
traveling at the speed limit, 3) using devices that are self-enforcing, 4) improving the roadway
environment for all users, and 5) enhancing the residential character of the roadway. To meet
these objectives and address resident concerns on the corridor, a traffic calming plan for the
corridor was drafted that included three traffic circles.
CITY OF CARLSBAD
TRAFFIC SAFETY COMMISSION
STAFF REPORT
COMMISSION MEETING OF: December 5, 2016 ITEM NO. 6C-1
(continued)
Page 3
An important factor for the success of traffic calming projects is the spacing of features at
regular intervals of approximately 500 feet to 700 feet. This spacing encourages consistent, low
speeds on the corridor and discourages drivers from speeding between devices. It also
encourages overall compliance by avoiding a roadway experience that may be irritating to
drivers. Based on the recommended spacing, cost-effective traffic circles were proposed at
Kalmia Circle (West), Kalmia Circle (East), and Nicolia Drive. The reverse curve between Kalmia
Circle (East) and Nicolia Drive functions similarly to a traffic calming “chicane” and this portion
of Cassia Road has been historically where the lowest speeds have been measured. In order to
enhance the traffic calming characteristics of this reverse curve, staff is planning to relocate the
existing speed feedback signs to help reduce speeds even more. (See Exhibit 2)
The traffic circles are performance-based practical elements and will be constructed using
striping and supplemented with ceramic domes. Painted extensions will narrow the roadway
while providing horizontal deflection to reduce speed. Large, reflectorized ceramic domes (8”
diameter with a 3” height) are designed to encourage compliance and accommodate the
turning movements of larger vehicles. Curb ramps will be constructed for pedestrian use and
also to allow bicyclists to and use the sidewalk to bypass each traffic circle. YIELD-control
provided on each approach will improve vehicular access from the side streets and pedestrian
crossings at the intersections.
On October 18, 2016, a public meeting was held at the Dove Library Auditorium. Over 800
notifications were mailed out to residents two weeks in advance of the meeting date and
approximately 50 residents attended the meeting. Staff presented the proposed traffic calming
plan and gave residents an opportunity to provide feedback on the proposed plan, identify
concerns and ask staff questions regarding specific features. Feedback was collected on
comments that were evaluated by staff. Comments were found to be mostly positive and staff
incorporated suggestions if they were feasible and were in line with the project’s traffic calming
objectives.
Staff developed final signing and striping design plans based on the public outreach. Staff is in
the process of implementing the traffic calming plan on Cassia Road. In order to expedite
implementation, components of the work will be conducted by different parties. The majority
of the signing and striping will be performed by our Streets Maintenance crews and other work
will be done by contractors.
CITY OF CARLSBAD
TRAFFIC SAFETY COMMISSION
STAFF REPORT
COMMISSION MEETING OF: December 5, 2016 ITEM NO. 6C-1
(continued)
Page 4
NECESSARY CITY COUNCIL ACTION:
No City Council action required for this item.
ATTACHED EXHIBITS:
1. Location Map
2. Cassia Traffic Calming Plan
3. Proposed Improvements at Poinsettia Lane
4. Proposed Improvements at El Camino Real
5. Proposed Improvements at Reverse Curve (Tradition driveway)
6. Proposed Improvements at Kalmia Circle (West)
7. Proposed Improvements at Kalmia Circle (East)
8. Proposed Improvements at Nicolia Drive
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0 0.0625 0.125 0.25 0.375 0.5
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NOT TO SCALE
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W84 (CA. MODIFIED)
NOT TO SCALE
INSTALL NEW W84 (CA, MODIFIED) ON EXISTING TELESPAR POST.
EXHIBIT 3: IMPROVEMENTS AT POINSETTIA LANE
CALMING
cb~D or;,
W84 (CA MODIFIED)
NOT TO SCALE
CASSIA ROAD
riNSTALL NEW W84 (CA, MODIFIED) I ON EXISTING TELESPAR POST
NOT TO SCALE
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EXHIBIT 4: IMPROVEMENTS AT
EL CAMINO REAL
I
EXHIBIT 5: IMPROVEMENTS AT
TRADITION DRIVEWAY
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0
0
0
0
0
0
0
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0
STRIPING WORK TO BE DONE:
PAINT 4" WHITE RIGHT EDGE LINE PER CA MUTCD DETAIL 27B.
PAINT 4" DOUBLE YELLOW MEDIAN PER CA MUTCD DETAIL 29.
INSTALL B" WHITE CERAMIC DOME PAVEMENT MARKERS WITH REFLECTORS.
DOMES SHALL BE OFFSET 1' INSIDE OF TRAFFIC STRIPE AND SHALL BE
PLACED AT 2.5' D.C. REFLECTORS SHALL FACE VEHICULAR TRAFFIC.
INSTALL B" YELLOW CERAMIC DOME PAVEMENT MARKERS WITH REFLECTORS.
DOMES SHALL BE OFFSET 1' INSIDE OF TRAFFIC STRIPE AND SHALL BE
PLACED AT 2.5 D.C. REFLECTORS SHALL FACE VEHICULAR TRAFFIC.
INSTALL SHARED LANE MARKING PER CA MUTCD FIGURE 9C-9 (THERMOPLASTIC).
INSTALL BIKE LANE + ARROW LEGEND (THERMOPLASTIC).
INSTALL YIELD MARKINGS PER CA MUTCD FIGURE 3B-16. TRIANGLES SHALL
HAVE A BASE WIDTH OF 24" AND LENGTH OF 36" AND SHALL BE PLACED
AT 3' D.C. (THERMOPLASTIC).
PAINT ASPHALT BRICK RED IN DEPICTED AREA PRIOR TO OTHER SIGNING AND STRIPING
WORK. COLOR SHALL BE APPROVED BY CITY PRIOR TO INSTALLATION.
PAINT ASPHALT CONCRETE GREY IN DEPICTED AREA PIROR TO OTHER SIGNING AND
STRIPING WORK. COLOR SHALL BE APPROVED BY CITY PRIOR TO INSTALLATION.
REMOVE EXISTING CONFLICTING STRIPING AND MARKINGS BY GRINDING.
PAINT 6" BROKEN WHITE BIKE LANE LINE PER CA MUTCD DETAIL 39A.
SCALE: 1"=20'
0 d~ ~ :z -:":
0 w :;:,:
WORK BY OTHERS:
TYPE C CURB RAMP PER SAN DIEGO
REGIONAL STANDARD DRAWING G-29.
RAMP OPENING SHALL BE 8'.
...--..... 3: ....___
.
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u
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WORK BY OTHERS:
SIGNING WORK TO BE DONE:
INSTALL R1-2 "YIELD" SIGN AND R1-2aP (MODIFIED) SIGN ON NEW
TELESPAR POST.
REMOVE EXISITNG Rl-1 "STOP" SIGN AND INSTALL NEW Rl-2 "YIELD"
SIGN AND R1-2aP (MODIFIED) SIGN ON EXISTING TELESPAR POST .
INSTALL R1-2 "YIELD"SIGN AND R1-2aP (MODIFIED) SIGN ON EXISTING
STREET LIGHT POLE.
INSTALL TWO (2) R6-4 "CHEVRON" SIGNS ON NEW TELESPAR POST.
ONE SIGN SHALL FACE SOUTHBOUND TRAFFIC AND ONE SHALL FACE
WESTBOUND TRAFFIC. THE BOTTOM EDGE OF THE LOWEST SIGN SHALL
BE 4' ABOVE GRADE.
INSTALL R6-4 "CHEVRON" SIGN ON TELESPAR POST FACING EASTBOUND
TRAFFIC. THE BOTTOM EDGE OF THE SIGN SHALL BE 4' ABOVE GRADE.
INSTALL W2-6 "TRAFFIC aRCLE" SYMBOL SIGN ON NEW TELESPAR POST.
INSTALL W2-6 "TRAFFIC aRCLE" SYMBOL SIGN ON EXISTING
STREET LIGHT POLE.
24"
TO
TRAFFIC
IN CIRCLE
R1-2aP (MODIFIED)
(BLACK LETTERING
ON WHITE SIGN)
260' TO BCR
-~ ~
---------,_--cv-<-« ®
~CASSIA ROAD
TYPE C CURB RAMP PER SAN DIEGO
REGIONAL STANDARD DRAWING G-29.
RAMP OPENING SHALL BE 8'. WORK BY OTHERS:
RELOCATE EXISTING SPEED FEEDBACK
SIGN. EXISTING R2-1(35) SPEED LIMIT
SIGN SHALL REMAIN.
EXHIBIT 6: IMPROVEMENTS AT KALMIA CIRCLE (W)
18"
CD
0
0
0
0
(j)
0
0
®
®
STRIPING WORK TO BE DONE:
PAINT 4" WHITE RIGHT EDGE LINE PER CA MUTCD DETAIL 278.
PAINT 4" DOUBLE YELLOW t.lEDIAN PER CA MUTCD DETAIL 29.
INSTALL B" WHITE CERAMIC DOME PAVEMENT MARKERS WITH REFLECTORS.
DOt.iES SHALL BE OFFSET 1' INSIDE OF TRAFFIC STRIPE AND SHALL BE
PLACED AT 2.5' D.C. REFLECTORS SHALL FACE VEHICULAR TRAFFIC.
INSTALL B" YELLOW CERAMIC DOME PAVEMENT t.lARKERS WITH REFLECTORS.
DOt.iES SHALL BE OFFSET 1' INSIDE OF TRAFFIC STRIPE AND SHALL BE
PLACED AT 2.5 O.C. REFLECTORS SHALL FACE VEHICULAR TRAFFIC.
INSTALL SHARED LANE MARKING PER CA MUTCD FIGURE 9C-9 (THERt.iOPLASTIC).
INSTALL BIKE LANE t ARROW LEGEND (THERt.iOPLASTIC).
INSTALL YIELID t.lARKINGS PER CA MUTCD FIGURE 3B-16. TRIANGLES SHAUL
HAVE A BASE WIDTH OF 24" AND LENGTH OF 36" AND SHALL BE PLACED
AT 3' O.C. (THERMOPLASTIC).
PAINT ASPHALT BRICK RED IN DEPICTED AREA PRIOR TO OTHER SIGNING AND STRIPING
WORK. COLOR SHALL BE APPROVED BY CITY PRIOR TO INSTALLATION.
PAINT ASPHALT CONCRETE GREY IN DEPICTED AREA PRIOR TO OTHER SIGNING AND
STRIPING WORK. COLOR SHALL BE APPROVED BY CITY PRIOR TO INSTAULATION.
REMOVE EXISTING CONFLICTING STRIPING AND t.lARKINGS BY GRINDING.
PAINT 6" BROKEN WHITE BIKE LANE LINE PER CA t.lUTCD DETAIL 39A.
WORK BY OTHERS:
RELOCATE EXISTING SPEED FEEDB ACK
SIGN. EXISTING R2-1 (35) SPEED LIMIT
SIGN SHALL REMAIN.
I~
250' TO BCR
SCALE: 1"=20'
0 d~ ~ 2: «: ~I
0 w (/) < u::
& & t•
WORK BY OTHERS:
TYPE C CURB RAMP PER SAN DIEGO
REGIONAL STANDARD DRAWING G-29.
RAMP OPENING SHALL BE 8'.
.
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u
<(
~
_.J
<(
::::::c::::: 0
SIGNING WORK TO BE DONE:
CD INSTALL R1-2 "YIELID" SIGN AND R1-2aP (t.lODIFIED) SIGN ON NEW
TELESPAR POST. REMOVE EXISTING "NO PARKING" SIGN.
0 REMOVE EXISITlNG RH "STOP" SIGN AND INSTALL NEW R1-2 "YIELD"
SIGN AND R1-2aP (t.lDDIFIED) SIGN ON EXISTING TELESPAR POST.
0 REMOVE EXISTING W1-3 AND W13-1P(30 MPH) SIGNS FROM EXISTING
STREET LIGHT POLE. INSTAUL R1-2 "YIELID" SIGN AND R1-2aP (t.lDDIFIED)
SIGN ON EXISTING STREET LIGHT POLE.
CD INSTALL TWO (2) R6-4 "CHEVRON" SIGNS ON NEW TELESPAR POST.
ONE SIGN SHAUL FACE SOUTHBOUND TRAFFIC AND ONE SHAUL FACE
WESTBOUND TRAFFIC. THE BOTIOM EDGE OF THE LOWEST SIGN SHALL
BE 4' ABOVE GRADE.
0 INSTALL R6-4 "CHEVRON" SIGN ON TELESPAR POST FACING EASTBOUND
TRAFFIC. THE BOTIOM EDGE OF THE SIGN SHALL BE 4' ABOVE GRADE.
0 INSTALL W2-6 "TRAFFIC CIRCLE" SYMBOL SIGN ON NEW TIELESPAR POST.
0 REMOVE EXISTING "NO PARKING" SIGN. INSTALL W2-6 "TRAFFIC CIRCLE"
SYMBOL SIGN ON EXISTING TELESPAR POST.
0
WORK BY OTHERS:
TYPE C CURB RAMP PER SAN DIEGO
REGIONAL STANDARD DRA'MNG G-29.
RAMP OPENING SHALL BE 8'.
EXHIBIT 7: IMPROVEMENTS AT KALMIA CIRCLE (EAST)
24"
TO
TRAFFIC 18'
IN CIRCLE
R1-2aP (MODIFIED)
(BLACK LETTERING
ON WH ITE SIGN)
6
CD
0
0
0
0
0
0
0
®
STRIPING WORK TO BE DONE:
PAINT 4" 'M-IllE RIGHT EDGE LINE PER CA MUTCD DETAIL 278.
PAINT 4" DOOBLE YELLOW MEDIAN PER CA MUTCD DETAIL 29.
INSTALL a• WHilE CERAMIC DOME PAVEMENT MARKERS 'MTH REFLECTORS.
DOMES SHALL BE OFFSET 1' INSIDE OF TRAFFIC STRIPE AND SHALL BE
PLACED AT 2.5' D.C. REFLECTORS SHALL FACE VEHICULAR TRAFFIC.
INSTALL a· YELLOW CERAMIC DOME PAVEMENT MARKERS 'MTH REFLECTORS.
DOMES SHALL BE OFFSET 1' INSIDE OF TRAFFIC STRIPE AND SHALL BE
PLACED AT 2.5 D.C. REFLECTORS SHALL FACE VEHICULAR TRAFFIC.
INSTALL SHARED LANE MARKING PER CA MUTCD FIGURE 9C-9 (THERI.IOPLASTIC).
INSTALL BIKE LANE + ARROW LEGEND (THERMOPLASTIC).
INSTALL YIELD MARKINGS PER CA MUTCD FIGURE JB-16. TRIANGLES SHALL
HAVE A BASE WIDTH OF 24" AND LENGTH OF 36" AND SHALL BE PLACED
AT 3' O.C. (THERMOPLASTIC).
PAINT ASPHALT BRICK RED IN DEPIClED AREA PRIOR TO OTHER SIGNING AND STRIPING
I'KlRK. COLOR SHALL BE APPROVED BY OTY PRIOR TO INSTALLATION.
PAINT ASPHALT CONCRElE GREY IN DEPIClED AREA PRIOR TO OTHER SIGNING AND
STRIPING WORK. COLOR SHALL BE APPROVED BY CITY PRIOR TO INSTALLATION.
REMO'vf EXISTING CONFUCTING STRIPING AND I.IAIRKINGS BY GRINDING.
1 ...
WORK BY OTHERS:
TYPE C CURB RAMP PER SAN DIEGO \
REGIONAL STANDARD DRAWING G-29.
RAMP OPENING SHALL BE 8'.
SCALE: 1"=20'
CASSIA ROAD
WORK BY OTHERS:
TYPE C CURB RAMP PER SAN DIEGO
REGIONAL STANDARD DRAWING G-29.
RAMP OPENING SHALL BE 8'.
''
SIGNING WORK TO BE DONE:
[2] INSTALL Rl-2 "YIELD" SIGN AND R1-2aP (MODIFIED) SIGN ON NEW
TELESPAR POST.
0 REMOVE EXISITNG Rl-1 "STOP" SIGN AND INSTALL NEW Rl -2 "YIELD"
SIGN AND R1-2oP (MODIFIED) SIGN ON EXISllNG TELESPAR POST.
0 INSTALL Rl-2 "YIELD" SIGN AND R1-2aP (I.IOOIFIED) SIGN ON EXISTING
STREET LIGHT POLE.
CD INSTALL TWO (2) R6-4 "CHEVRON" SIGNS ON NEW lELESPAR POST.
ONE SIGN SHALL FACE SOUTHBOUND TRAFFIC AND ONE SHALL FACE
WESllBOOND TRAFFIC. THE BOTIOM EDGE OF THE LOWEST SIGN SHALL
BE 4' ABOVE GRADE.
[I] INSTALL TWO (2) R6-4 "CHEVRON" SIGNS ON NEW lELESPAR POST.
ONE SIGN SHALL FACE NORTHBOUND TRAFFIC AND ONE SHALL FACE
EASllBOOND TRAFFIC. THE BOTIOM EDGE OF THE LOWEST SIGN SHALL
BE 4' ABOVE GRADE.
0 INSTALL W2-6 "TRAFFIC CIRCLE" SYMBOL SIGN ON NEW lELESPAR POST.
0 INSTALL W2-6 "TRAFFIC CIRCLE" SYI.IBOL SIGN ON EXISTING STREET
LIGHT POLE.
125' TO BCR
I
EXHIBIT 8: IMPROVEMENTS AT NICOLIA DRIVE
24"
TO
TRAFFIC 18"
IN CIRCLE
R1-2aP (MODIFIED)
(BLACK LETTERING
ON WHITE SIGN)
Cassia Road Traffic Calming
December 5, 2016
Location Map
What we’ve done to date
Poinsettia / Cassia curve
•Reconfiguration of eastbound left turn on Poinsettia Lane
at Cassia Road
•Advance curve warning and speed advisory signs
•Concrete barrier
•Routed bikes behind barrier
4
What we’ve done to date
Cassia Road Speeding Concerns
•Vehicle lane narrowing via striped bike lanes
•“35” pavement legends to augment posted speed limit
•Speed feedback signs
6
What we’ve done to date
Oversize Trucks & Excessive Noise
•Truck prohibition signs
•HOA working with Police to identify trucks
Pedestrian Crossings
•Adding wheelchair ramp on Poinsettia
What we’ve done to date
Meetings with Residents
•August 9, 2016 –staff directed to propose and implement
a traffic calming plan on Cassia Road
•October 18, 2016 – public meeting at Dove Library
Auditorium to present proposed traffic calming plan to
residents
Traffic Calming Objectives for Cassia Road
•Introduce traffic calming features at regularly spaced,
recommended intervals
•Use devices that are self‐enforcing
•Improve roadway environment for all users
•Enhance residential character of Cassia Road
10
Traffic Calming Plan for Cassia Road
•Entry signs at Poinsettia Lane and El Camino Real
•Traffic circle at Kalmia Circle West
•Traffic circle at Kalmia Circle East
•Relocation of Speed Feedback signs to reverse curves
•Traffic circle at Nicolia Drive
11
500‐700 Foot Spacing
How Roadway Design Influences
Driver Behavior
Straight Roads = Higher Speed
Traffic Calming:
Introducing Horizontal Deflection
Horizontal Deflection thru
Traffic Circle and Curb Extensions
Do STOP Signs Calm Traffic?
STOP signs are for traffic control
•Used assign right‐of‐way at intersection
STOP signs are not intended for speed control
•Not appropriate for traffic calming
•Interrupt traffic flow and create unnecessary conflicts
•Punish drivers traveling the speed limit
•Not environmentally friendly
•Not self‐enforcing
Neighborhood Meeting
October 18, 2016 –Dove Library Auditorium
•Over 800 notifications were mailed two weeks prior
•Approximately 50 attendees
•Presentation of proposed traffic calming plan
•Question and answer session
•Feedback collected on comment cards
What We Heard
Comment or Concern Response
Poinsettia Lane needs to be completed > Not within the scope of this project
Support/doesn’t support dual left turns at ECR > Will not be implemented at this time
Traffic circle at Genoa Lane > Would compromise spacing of features
Speed of vehicles through reverse curves > Speed feedback signs will be relocated to reverse curves
Left turn access at Kalmia Circle is difficult > Proposed traffic circles will improve left turn access
Cars passing on the right using bike lane > Proposed extensions will prevent passing on the right
Concern regarding bikes on sidewalks > No problems reported at State Street
SketchUp image here
SketchUp image here
Intersection Treatment at Kalmia (W)
Intersection Treatment at Kalmia (E)
Existing Reverse Curve
Intersection Treatment at Nicolia
Staff Recommendation
•Support traffic calming plan for Cassia Road as
presented.