City of San Marino Traffic Safety Measures
How are Speed Limits Set?
SPEED
LIMIT
25
Phantom
55
Applicable sections of the California Vehicle Code (CVC) and U.S. Department of Transportation Federal
Highway Administrations Manual on Uniform Traffic Control Devices (MUTCD) and the California
Supplement are followed so that the posted speed limit can be upheld by the courts and do not constitute
a "Speed Trap" as defined by CVC Section 40802.
Determination of posted speed limits follow the latest Traffic Operations Policy Directive by the State of
California Department of Transportation.
Speed limits shall be established at the nearest (5 mph) increment of the 85th percentile speed of free
flowing traffic, except as shown in the two options below:
The posted speed may be reduced by 5 mph from the nearest 5 mph increment of the 85th percentile
speed, in compliance with CVC Sections 627 and 22358.5.
For cases in which the nearest 5 mph increment of the 85th percentile speed would require a rounding
up, then the speed limit may be rounded down to the nearest 5 mph increment below the 85th
percentile speed, if no further reduction is used. But then the Department of Transportation or a local
authority shall not reduce the speed limit any further for any reason. CVC Section 21400(4b).
If a reduction is applied, an Engineering and Traffic Survey shall document in writing the conditions and
justification for a lower speed limit and is approved by a Registered Civil Engineer or Traffic Engineer.
Cityy
SAN MARINO
CALIFORNIA
7
TRANSTECH
Est. 1989View entire presentation