In compliance with State laws and the governing California Vehicle Code, vehicle speed laws can only be enforced when speed limits of a roadway are determined by an engineering and traffic survey. The Engineering and Traffic Survey is an engineering study of the prevailing speeds and a review the traffic conditions of the roadway which is completed every five years for streets greater than 40’ in width, regardless of the street’s classification. The local streets have a prima facie speed limit of 25 mph unless a different speed limit is determined by an engineering study. Speed limits in California are governed by the California Vehicle Code (CVC), Section 627, 22348 through 22413 and 40802.

Engineering and Traffic Survey 2018