Per the California Vehicle Code, public agencies are required to conduct an Engineering and Traffic Survey every five years to determine the validity of posted speed limits. The survey results are used to establish or adjust posted speed limits on streets where radar is used as an enforcement tool. Typically, speed limits are set near the 85th percentile speed that statistically represents one standard deviation above the average speed and establishes the upper limit of what is considered reasonable and prudent. As with most laws, speed limits need to depend on the voluntary compliance of the greater majority of motorists. Speed limits cannot be set arbitrarily low, as this would create a situation where a majority of drivers would violate the law. The findings of the recently completed Engineering and Traffic Survey determined the City’s current speed limits are accurate and no changes were proposed. View the 2019 Engineering and Traffic Study.