No, it is unlawful to paint or place other permanent markings on any paved surfaces or curbs per City Ordinance 12.12.020.

The City will consider painting curbs red (prohibiting parking) based on the City criteria if it is determined that unusual sight distance or access problems exist. If warranted, the City will usually notify the fronting and adjacent property owners prior to proceeding with any parking restriction. For more information, call Engineering at (925) 516-5420 or submit a Service Request.

In residential areas, the speed limit is set at 25 miles per hour ("mph") by the California Motor Vehicle Code (“Vehicle Code”). On non-residential streets, the speed limit is set based on a radar survey. The standards for setting speed limits are set forth in the Vehicle Code. Therefore, a speed limit is not just arbitrarily set, but is based on the actual speeds of vehicles. Lowering a speed limit in hopes of seeing a corresponding slowing of traffic does not usually work. Setting a speed limit without following the Vehicle Code guidelines would invalidate any citation issued by use of radar. Refer to the City's Traffic Calming procedures for more information.

For additional information about speed limits, speed humps and speeding, call Engineering at (925) 516-5420, or submit a Service Request.

The intent of a STOP sign is to determine which driver has the right-of-way at an intersection. Studies have proven that STOP signs do a very poor job when it comes to slowing down drivers. The effect is usually limited to within 100 feet of an intersection. Afterward, drivers tend to speed up, sometimes to speeds greater than what occurred before the STOP signs were installed. When appropriate, the City will install STOP signs based on the City’s policy and criteria for Installation of STOP Signs.

For additional information about speed limits, speed humps and speeding, call Engineering at (925) 516-5420, or submit a Service Request.

The City will install speed humps under certain conditions. The City has adopted Traffic Calming procedures as well as a Speed Hump Installation Policy. Through a phased approach of reducing speeds on a residential street, speed humps can be considered after other remedies have been attempted such as signing, striping, enforcement and placement of a radar trailer.

For additional information about speed limits, speed humps and speeding, call Engineering at (925) 516-5420, or submit a Service Request.

Based on the City’s Traffic Calming procedures, a number of steps can be taken to address speeding vehicles. City staff will determine the need for speed limit signs, speed limit messages, placement of a radar trailer, enforcement and striping. The City can also conduct a 24-hour speed and volume study to determine the extent of the problem. Ultimately, the placement of speed humps can be considered.

For additional information about speed limits, speed humps and speeding, call Engineering at (925) 516-5420, or submit a Service Request.

To report a malfunctioning traffic signal, call Engineering at (925) 516-5420 or Public Works at (925) 516-6000, or submit an online Service Request.

A traffic signal is an electrical device and, from time-to-time, may experience problems and malfunction. If you feel a traffic signal is not functioning properly, call Engineering at (925) 516-5420, or submit an online Service Request.

Traffic signals should be timed to provide pedestrians with enough time to safely cross a street. The available time includes the flashing portion of the signal indication. If there is not adequate time, call Engineering at (925) 516-5420 or submit an online Service Request to request the evaluation of an intersection for consideration of an increase in time.

Per California Motor Vehicle Code, a Transportation Permit is required for vehicles that exceed 8 feet in width, 65 feet in length, 14 feet in height, and/or 80,000 lbs. For more information, refer to the Transportation Permit Guidelines.