HomeMy WebLinkAboutPW Changing Speed Limits on Three Streets in San Rafael PPTDepartment of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 1
Speed Limit Changes
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 2
Background
•California Vehicle Code (CVC)
requires Engineering and Traffic
Surveys every 7 years in order to
enforce speed zones by radar
•“Speed Trap” Law
•85th percentile speed of vehicles
largely dictates speed limits
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 3
Background
•W-Trans was hired last Spring 2018
•31 segments studied and re-verified at the same posted
speed
•2 segments became enforceable with passing of
ordinance earlier this year
•8 segments deferred due to SMART construction
•3 segments would become enforceable with passing of
ordinance
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 4
Engineering & Traffic Surveys
•Data Collected:
–Prevailing speeds
–Daily volumes
–Collision records
–Street width
–Adjacent Land Uses
–Roadside conditions not
readily apparent to driver
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 5
Findings
•Woodland: 85th percentile
speed of 30 mph
•There are not conditions
not readily apparent to the
driver to warrant a 5 mph
reduction
•Staff is recommending the
posted speed be changed
to 30 mph to comply with
CVC
Woodland, looking northbound
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 6
Findings
•DuBois and Francisco West: 85th
percentile speed of 33 mph
•Round to nearest 5 = 35 mph
•Apply 5 mph reduction for
higher-than-average collision
rates and pace of cars = 30 mph
•Staff is recommending the
posted speed be changed to 30
mph to comply with CVC
33 mph
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 7
Next Steps
•Staff recommends Council pass ordinance to print
–2nd Reading at January 20 City Council
•If Council approves, change is publicly noticed
•Signs installed by Public Works crews
•Posted speeds go into effect 30 days later
DuBois from Irwin to Woodland 30 mph
Francisco Blvd West from 2nd to Rice 30 mph
Woodland from DuBois to City Limits 30 mph
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 8
Questions?
Department of Public Works
Speed Limit Changes
December 16, 2019
www.cityofsanrafael.org/DPW
Slide 9
Engineering & Traffic Surveys
•Good for 7 years and up to 10 if
roadway hasn’t changed
•PD may enforce speed by radar