Advanced Traffic Management System

The City of Corona utilizes an Advanced Traffic Management System (ATMS) to monitor traffic throughout the City and to make adjustments to the traffic signal system as necessary from the Traffic Management Center (TMC). The TMC is located at City Hall on the 2nd floor in the Public Works section.


The TMC was designed and built when the Corona City Hall was constructed in 2005. Since then, over $2 million in state and federal grants have helped expand the ATMS to include over 70 traffic signals, 15 traffic monitoring cameras and a video and data link between the CalTrans District 8 TMC in San Bernardino. Currently Phase 2 of the ATMS is under development utilizing a 50/50 split of City and grant funds to increase the traffic signal and monitoring camera capacity of the system.

Being the gateway to and from Orange County allows Corona to play an integral part in the flow of traffic on the SR-91 and I-15 freeways. Because of this Corona has experienced some traffic concerns. Commuters cut-through Corona's local streets to bypass the congested freeways. As a result a system was designed to manage traffic and assist in relieving the congestion. The ATMS and TMC are tools that will assist in moderating the congestion of the local streets. From the TMC, staff can monitor traffic on local streets and the freeways. Timing of the traffic signals can be adjusted. These changes have had a positive impact. Soon a plan to automate the response to high traffic demand with a "traffic responsive" system that reacts to ever changing traffic patterns will be implemented.

Corona is a leader in the traffic industry with a state first collaboration effort with CalTrans. CalTrans has agreed to allow Corona to, during non-routine traffic congestion, override the timing of the CalTrans traffic signals at the bottom of the freeway ramps. This will result in a seamless response to traffic congestion to the motorist and allow traffic to filter off the freeway onto Corona's local streets around an incident and back on to the freeway more efficiently.

Corona's ATMS and TMC have been recognized by the American Public Works Association's (APWA) Inland Empire and Southern California Region as Project of the Year 2006; the Press Enterprise; Corona's Chamber of Commerce, and CalTrans Headquarters.  Contact the Corona TMC at (951) 739-4-TMC (739-4862).

To contact the City of Corona Traffic Engineering please call us at (951) 736-2266,  e-mail us at, or use the online Public Works Service Request Form.