Traffic Services

The City of San Dimas is dedicated to the needs and concerns of our residents. In regards to traffic safety and traffic-related matters, the Traffic Safety Committee meets to discuss resident, business, and staff concerns. The meetings are typically held on the third Thursday of every other month at 9:30am in the City Council Conference Room and are open to the public.

To submit a traffic related concern, please complete the Traffic Investigation Report (TIR) request form below. The form may be sent via email to publicworks@sandimasca.gov , or printed and submitted via mail or in person to Public Works, San Dimas City Hall, 245 E. Bonita Avenue.  The request may also be submitted via fax to 909.267.7710.  All requests are initially reviewed by the Public Works Director. If further investigation is recommended, the request will be reviewed by the Traffic Safety Committee by the procedures and schedule. For further questions, call  909. 394.6240.

For traffic related concerns in the City, complete a Traffic Investigation Request form. The request may be filled out online, saved and emailed to the Traffic Secretary at publicworks@sandimasca.gov or printed and submitted via mail or in person at City Hall. Fax requests to 909.267.7710. All requests are initially reviewed by the Public Works Director. If further investigation is recommended, the request will be reviewed by the Traffic Safety Committee by the procedures and schedule.

The City maintains volume counts on file of major intersections including arterial, collector and residential streets. Additional counts are kept for areas where traffic engineering studies were required. Traffic counts at various intersections throughout the City as of August 2017.

The City’s Engineering and Traffic Survey (often referred to as a Speed Zone Survey) is the approved and governing document for speed limits on all City Streets.  The Study is conducted by a licensed Traffic Engineer in compliance with guidelines contained in the latest versions of the California Vehicle Code and the California Manual on Uniform Traffic Control Devices.  The Traffic Engineering Study is submitted to City Council for approval and adopted via passing of a City Ordinance.  The approved Speed Zone Study is distributed to the Sheriff’s Department for their use in enforcement of speed limits.

At the January 24, 2023 City Council Meeting, Ordinance 1296 was approved amending section 10.32.030 of the San Dimas Municipal Code. The ordinance designated the following routes for vehicles exceeding the maximum gross weight of three (3) tons;