Caltrans district 12 encompasses the entirety of Orange County. It operates and maintains field devices in Orange County. Located in Irvine, the TMC is shared with CHP.
|Caltrans Regional TMCs|
|Roadway/Railroad Inspection Facilities|
|Caltrans TMC Roadside Equipment|
|Video Surveillance Clearing House|
|Excise Summary Terminal Activity Reporting System (ExSTARS)|