California Department of Transportation

Right Column

Welcome to Caltrans District 12

Serving Orange County
Caltrans - District 12
3347 Michelson Drive, Suite 100
Irvine, CA 92612

(949) 724-2000 Location and Brochure and Site Map

Check Current Highway Conditions
You can also call 1-800-427-ROAD
for current highway conditions...

About District 12 - The transportation system in California is one of the state’s greatest assets, unmatched in size,capacity, and convenience to the traveling public. The California Department of Transportation (Caltrans) is the public agency responsible for designing, building, operating and maintaining California’s state highway system, which consists of freeways, highways, expressways, toll roads and the area between the road and property line. More

District Director - Ryan Chamberlain


Projects and Alerts



Please use the shields above to select the desired route for Commuter Alerts and Project information.


SR-1 Pacific Coast Highway

  • No alerts available at this time.

SR-39 Beach Boulevard

  • No alerts available at this time.


  • No alerts available at this time.


SR-91 Lane Extension and Reconstruction Project at Tustin Ave (January 2014 - Summer 2017)
Once complete, motorists traveling northbound on SR-55 to the westbound SR-91 connector will have an option to exit Tustin Avenue using the new exit only bypass lane north of the connector, or the general purpose lane.
- Project Fact Sheet
- Bike Detour for Santa Ana River Bridge


  • No alerts available at this time.

SR-241 & 261

  • No alerts available at this time.

Tesoro Extension


  • No alerts available at this time.

what's happening in District 12