HomeMy WebLinkAbout041922-08.1ADMINISTRATIVE STAFF REPORT 8.1
TO: Mayor and Town Council April 19, 2022
SUBJECT: Resolution No. 27-2022, authorizing the installation of traffic calming
measures on Greenbrook Drive, St. Christopher Drive, St. David Drive
and Harlan Drive
BACKGROUND
This report recommends that the Town Council adopt Resolution No. 27-2022
authorizing the implementation of traffic calming measures including traffic signs,
pavement markings and striping, three (3) speed lumps, curb extensions and crosswalks
at three (3) locations, and two (2) radar speed display signs on Greenbrook Drive
(between El Capitan Drive and Camino Ramon), St. Christopher Dr, St. David Dr, and
Harlan Dr. The traffic calming measures are proposed as a result of implementation of
the Neighborhood Traffic Management Program (“NTMP”) for the Greenbrook Drive
area neighborhood, south of El Capitan Drive. During the NTMP process, concerns
expressed to the Town included continued incidents of speeding and cut-through traffic.
DISCUSSION
Throughout 2018, Town staff met with residents of the Greenbrook Drive area
neighborhood to discuss their traffic safety concerns. Three neighborhood meetings were
held where staff presented data on prevailing traffic conditions including vehicular
speeds and volumes, and pedestrian and bicycle volumes. Options for traffic calming
measures were presented and vetted at length at these meetings. Ultimately, traffic
calming plans were developed for Greenbrook Drive, St. Christopher Drive, St. David
Drive and Harlan Drive,. Subsequently, neighborhood residents began circulating
petitions and gathering signatures as part of the NTMP process requirements. Ultimately,
the Town received a completed neighborhood petition for St. David Drive in 2019 and
petitions for St. Christopher Drive and Greenbrook Drive in 2022 (Attachment B).
Generally, the prevailing speeds and volumes on the subject streets were found to meet
the criteria for traffic calming measures, as prescribed in the NTMP guidelines. As this
NTMP effort includes multiple streets, a holistic approach was taken by staff in analyzing
the traffic data and developing traffic calming measures. The Town proceeded to
conduct traffic surveys at six (6) locations along the subject streets. The surveys revealed
prevailing (85th percentile) vehicular speeds ranging between 26.1 mph and 33.3 mph.
The data confirmed that Greenbrook Drive, St. Christopher Drive and Harlan Drive
experience unacceptable prevailing speeds (>32 mph). Results of the prevailing traffic
speeds results are summarized in Table 1:
Greenbrook Drive (south) Area 2 April 19, 2022
Traffic Calming Measures
Table 1 – Greenbrook Drive Area Traffic Data
Street Location
Vehicle Volumes
(average daily
traffic)
Prevailing
Vehicle Speeds
(85th Percentile)
Greenbrook Drive South of St. Christopher Drive 3,152 29.2 mph
Greenbrook Drive South of Harlan Drive 5,999 33.3 mph
St. Christopher Drive West of Harlan Drive 1,243 33.1 mph
Harlan Drive South of St. Christopher Drive 452 29.7 mph
Harlan Drive South of St. Greenbrook Drive 2,943 33.2 mph
St. David Drive Mid-segment 442 26.1 mph
Traffic Calming Plan Development
Based on evaluation of traffic data, and in conjunction with extensive input received from
residents, staff proceeded to develop a comprehensive traffic calming plan for
Greenbrook Dr, St. Christopher Drive, St. David Drive and Harlan Drive to address the
speeding and cut-through traffic issues. The proposed traffic calming plan elements for
the four subject streets are provided as Attachment C, summarized as follows (Table 2):
Table 2- Traffic Calming Plan
Street Location/Limits Traffic Calming Measures
Greenbrook Drive El Capitan Drive
to Camino Ramon
Radar Display Sign (1)¹
Pavement Legends - “25 MPH” and Bicycle
“Sharrows”
Traffic Signs – 25 MPH speed limit, Bicycle
“Share the Road”
Raised Crosswalks, curb extensions and
associated signage at three locations²
St. Christopher Drive Entire length Radar Display sign (1)
Pavement Legends - “25 MPH”
Traffic Signs – 25 MPH speed limit
Pavement Striping – centerline and shoulders
St. David Drive Entire length Speed Lumps (3) and Speed Lumps/15 MPH
advisory signage (2)
Harlan Drive³ Entire length Crosswalk striping across intersecting minor
streets
Pavement Legends - “25 MPH” and Bicycle
“Sharrows”
Traffic Signs – 25 MPH speed limit and Bicycle
“Share the Road”
¹Total of two radar signs - additional radar sign previously approved/purchased by Town
²Recommended as a Phase II, grant-funded project
³Staff recommendation only - petition not received from Harlan Drive
Greenbrook Drive (south) Area 3 April 19, 2022
Traffic Calming Measures
Petition Process
As previously described, neighborhood petitions were circulated by residents with the
associated traffic calming plans for the subject streets. Due to several factors, including
the Covid-19 pandemic, the resident-driven petition process took several years to
complete, with the St. David Drive petition first submitted in 2019 followed by the
Greenbrook Drive and St. Christopher Drive petitions in 2022. The petitions met the
required 70% (primary street)/50% (adjacent street) resident support criteria required in
the NTMP Guidelines for Town Council consideration. To date, Harlan Drive has not
submitted its petition for traffic calming measures that included speed lumps at two
locations and centerline and shoulder pavement striping.
Subsequently, as part of this NTMP approval, staff is recommending the implementation
of 25 MPH and bicycle share-the-road (“Sharrows”) pavement legends and crosswalk
striping measures on Harlan Drive as routine traffic safety improvements, as
summarized in Table 2, and shown in Attachment C. It is to be noted that pavement
legend “sharrows” on Harlan Drive are also a recommendation in the Townwide Bicycle
Master Plan. Consideration of any additional traffic calming measures on Harlan Drive
would be considered in the future if residents were able to produce a petition meeting
the NTMP requirements.
Costs and Phasing
The total cost of the recommended traffic calming measures is approximately $212,000.
Due to the extensive cost and scope, it is recommended that the implementation of the
measures be completed in two phases. Phase I consists of all recommended signing and
striping, pavement markings, and radar sign installations at a cost of $70,000, and would
be implemented immediately upon Town Council approval.
Phase II consists of the design and construction of raised crosswalks, curb extensions and
associated signing and striping at three (3) proposed locations on Greenbrook Drive at a
cost of $142,000. Due to the extensive cost, it is recommended that grant funding be
pursued to cover the design and construction of this phase and would be completed upon
successful procurement of funds at a date to be determined.
PUBLIC CONTACT
An informational meeting was hosted by Town staff on March 28, 2022 via Zoom to
provide area residents with an update on the NTMP effort and traffic calming plan
recommendations (Attachment D). Notification of the Town Council meeting was
circulated to area residents (Attachment E). Posting of the meeting agenda serves as a
notice to the general public.
Greenbrook Drive (south) Area 4 April 19, 2022
Traffic Calming Measures
FISCAL IMPACT
The costs associated with purchase and installation of the recommended Phase I traffic
calming measures is approximately $70,000. Sufficient funds for these improvements
have been appropriated in the 2021/22 Capital Improvement Program as part of CIP No.
C-305, Traffic Management Program. (Attachment F).
RECOMMENDATION
Adopt Resolution No. 27-2022, authorizing the installation of traffic calming measures on
Greenbrook Drive, St. Christopher Drive, St. David Drive and Harlan Drive.
Prepared by:
Andrew Dillard
Transportation Manager
Reviewed by:
Joseph Calabrigo
Town Manager
Attachments: A – Resolution No. 27-2022
B – Petitions in Support of Proposed Traffic Calming Measures
C – Maps of Proposed Traffic Calming Measures
D – 3/28/22 Neighborhood Meeting Notification
E – 4/19/22 Town Council Meeting Notification
F – CIP Page No. C-305
RESOLUTION NO. 27-2022
AUTHORIZING THE INSTALLATION OF TRAFFIC CALMING MEASURES ON
GREENBROOK DRIVE, ST. CHRISTOPHER DRIVE, ST. DAVID DRIVE AND
HARLAN DRIVE
WHEREAS, Greenbrook Drive, St. Christopher Drive, St. David Drive and Harlan
Drive, are public streets maintained by the Town of Danville; and
WHEREAS, Goal 12 of the Town of Danville General Plan directs the Town to “Provide
for safe and efficient travel on Town of Danville streets”; and
WHEREAS, Policy 14.01 of the Town of Danville General Plan directs the Town to
“Implement neighborhood traffic management measures, which increase neighborhood
livability, discourage speeding, and ensure vehicle, pedestrian, and bicycle safety”; and
WHEREAS, as part of 2021/22 Capital Improvement Program Project No. C-305, Traffic
Management Program, the Town Council has appropriated funding for installation of
traffic calming measures; and
WHEREAS, the resident petition and consent of adjacent property owners have secured
the required support for installation of traffic signs, pavement markings and striping,
three (3) speed lumps, curb extensions and crosswalks at three (3) locations, and two (2)
radar speed display signs; and
WHEREAS, the purpose of the traffic calming measures is to elevate driver awareness of
the posted 25 mph speed limit and, thus, lower prevailing speeds to within acceptable
standards to enhance neighborhood livability; and
WHEREAS, 70% of residents of Greenbrook Drive between El Capitan Drive and Camino
Ramon, St. Christopher Drive and St. David Drive, support this action; now, therefore be
it
RESOLVED that the Danville Town Council authorizes the installation of traffic calming
measures including traffic signs, pavement markings and striping, three (3) speed lumps,
curb extensions and crosswalks at three (3) locations, and two (2) radar speed display
signs on Greenbrook Drive, St. Christopher Drive, St. David Drive and Harlan Drive.
DocuSign Envelope ID: 0CE85962-1991-443E-B64D-B40C5A93F5EF
ATTACHMENT A
PAGE 2 OF RESOLUTION NO. 27-2022
APPROVED by the Danville Town Council at a regular meeting on April 19, 2022, by the
following vote:
AYES:
NOES:
ABSTAINED:
ABSENT:
MAYOR
APPROVED AS TO FORM: ATTEST:
CITY ATTORNEY CITY CLERK
DocuSign Envelope ID: 0CE85962-1991-443E-B64D-B40C5A93F5EF
Greenbrook Dr South NTMPGreenbrook Drive Neighborhood Map
Greenbrook Petition Area
NTMP Petition Signatures Requirement:70% Signatures Required (one per household)
Greenbrook: 49/70 Signatures
Ü
0 0.10.05 Mi
ATTACHMENT B
Greenbrook Dr South NTMPSt Christopher Drive Neighborhood Map
St Christopher Primary Street
St Christopher Secondary Street
NTMP Petition Signatures Requirement:
Primary Street: 32/45 Signatures (70%; 1 per household)Secondary Street: 2/4 Signatures (50%; 1 per household)
Ü
0 0.0650.0325 Mi
Greenbrook Dr South NTMPSt. David Drive Neighborhood Map
St David Primary Street
St David Secondary Streets
NTMP Petition Signatures Requirement:
Primary Street: 18/26 Signatures (70%; 1 per household)Secondary Street: 26/51 Signatures (50%; 1 per household)
Ü
0 0.060.03 Mi
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“Small Town Atmosphere
Outstanding Quality of Life”
5 1 0 L A G O N D A W A Y , D A N V I L L E , C A L I F O R N I A 9 4 5 2 6
Administration Building Engineering & Planning Transportation Maintenance Police Parks and Recreation
(925) 314-3388 (925) 314-3330 (925) 314-3310 (925) 314-3310 (925) 314-3450 (925) 314-3700 (925) 314-3400
March 16, 2022
Dear Residents of the Greenbrook South Neighborhood:
For the last several years, the Town of Danville has received complaints regarding
pedestrian safety, speeding, and cut-through traffic throughout the Greenbrook South
neighborhood. In fall of 2016, residents applied to the Neighborhood Traffic
Management Program (NTMP) which was established in 1996 as a means for residents
and the Town to work collaboratively to address residential traffic safety issues.
In response, the Town conducted a traffic analysis to measure the speed and volume of
motorized vehicles and pedestrian and bicycle volumes on Greenbrook Drive, Harlan
Drive, St. Christopher Drive, and St. David Drive. Subsequently, the Town conducted
three neighborhood meetings in February, May, and October of 2018 to share the results
of the study and to discuss potential next steps in the process. Traffic calming plans
were finalized and residents were provided supporting documents and petition
instructions to satisfy the NTMP requirement of 70% core neighbor approval. In 2022,
the Town received the completed petitions for Greenbrook Drive, St. Christopher Drive,
and St. David Drive.
Given the length of time and collective efforts that this process has endured, and in
consideration of the scope of the overall project, the Town will be presenting the final
traffic calming plan and proposed schedule for approval at a virtual informational
meeting on:
Greenbrook Drive NTMP Meeting
Monday, March 28, 2022
at 6:00 p.m.
Zoom Video Conference
Webinar ID: 895 6779 9506
Link: https://us02web.zoom.us/j/89567799506
For questions or comments, please contact Katelyn Costa, Transportation Program
Specialist, at kcosta@danville.ca.gov or 925-314-3374.
Thank you in advance for taking the time to attend this meeting and for your interest in
neighborhood traffic safety and preserving Danville’s quality of life.
ATTACHMENT D
“Small Town Atmosphere
Outstanding Quality of Life”
5 1 0 L A G O N D A W A Y , D A N V I L L E , C A L I F O R N I A 9 4 5 2 6
Administration Building Engineering & Planning Transportation Maintenance Police Parks and Recreation
(925) 314-3388 (925) 314-3330 (925) 314-3310 (925) 314-3310 (925) 314-3450 (925) 314-3410 (925) 314-3400
TO: Greenbrook Drive Area Residents DATE: April 7, 2022
NOTICE OF PROPOSED TRAFFIC CALMING PLAN
The purpose of this notification is to inform you that the Danville Town Council will be
considering approval of a traffic calming plan consisting of the installation of traffic signs,
pavement markings, speed lumps, curb extensions, and two (2) radar speed display signs
on Greenbrook Drive, Harlan Drive, St. Christopher Drive, and/or St. David Drive.
For several years, residents of the Greenbrook Drive area neighborhood (south of El
Capitan Drive) has been participating in the Town’s Neighborhood Traffic Management
Program (“NTMP”) process in attempts to address traffic safety concerns along
Greenbrook Drive, St. Christopher Drive, St. David Drive, and Harlan Drive. In spring
2022, the Town received completed neighborhood petitions in support of the proposed
traffic calming plans for Greenbrook Drive, St. Christopher Drive and St. David Drive,
fulfilling the program requirements for forwarding it to the Town Council for
consideration. Although a petition for Harlan Drive was not received, staff
recommendations for routine crosswalk striping improvements will be included with the
traffic calming plan proposal. The proposed Greenbrook Drive area neighborhood traffic
calming plans can be found on the Town website at
https://www.danville.ca.gov/176/Neighborhood-Traffic-Management-Program.
With the NTMP requirements met, the Town Council will be considering the Greenbrook
Drive (south) traffic calming plan at its regular meeting on April 19, 2022, 5:00 p.m.,
which is currently being held via Zoom. Meeting information, including agendas, staff
reports and Zoom meeting links can be found at https://www.danville.ca.gov/129/Meetings-
Agendas-Minutes.
You are welcome to attend this meeting and express your comments and concerns to the
Town Council. In the interim, if you should have any questions or concerns regarding the
proposed Greenbrook Drive (south) traffic calming plan, please contact Katelyn Costa,
Transportation Program Specialist, at (925) 314-3374, kcosta@danville.ca.gov.
ATTACHMENT E
ATTACHMENT F