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Caltrans District 12 Homepage 
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 with Site Map
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 - Cindy Quon
- UPDATE! SR-91 EB Lakeview Off-ramp Full Ramp Closure - February 14 - March 25, 2012
- UPDATE! Full Ramp Closure Southbound State Route 55 Dyer Road (East) Off-Ramp February 17 to April 13, 2012.
- Nighttime I-5 Closure at Crown Valley Parkway in Mission Viejo February 9th and 10th for Bridge Falsework Removal.
- Update! SR-91 Closures - Week of February 13, 2012.
- Night work on Gene Autry Way (East) bridge for two weeks starting February 6, 2012.
- Update! SR-91 Closures - Week of February 6, 2012.
- WB SR-91 Imperial Highway Off-Ramp Construction beginning January 13th
- SR-91 at Imperial Highway (Imperial HighwayBridge) Bridge work beginning November 14, 2011.
- UPDATE! State Route 55 Northbound Dyer Road East and West Onramp Closure November 5, 2011 This Includes a full Closure Of Dyer Road Between Grand Avenue and Pullman Street . Dyer Road (West) off-ramp closure is extended and will not open until February 18, 2012.
- SR-91 EB/WB Weir Canyon Road Offramp Construction, Lanes Reduced until February 2012 (Includes Detour Maps).
- Southbound State Route 55 Project to Widen Freeway and Bridge and Construct Retaining/Tieback Wall.
- State Route 91 Widening Project commences construction August 22, 2011.
- Interstate 5 roadway and bridge widening project in San Juan Capistrano has commenced.
- SR-57 Northbound Widening Project Alerts (South Segment).
- West County Connector Project Alerts (affecting I-405 / I-605 / SR-22).
Environmental Reports / Project Details / Public Hearings
- WCC (SR-22, I-405, I-605) Final Environmental Impact Study
- I-5 High Occupancy Vehicle (HOV) Lane Extension Project
- SR-91 Initial Study with Mitigated Negative Declaration for the proposed Westbound State Route 91 Lane Extension and Auxiliary Lane Reconstruction Project.
- SR-73 - Initial Study with Mitigated Negative Declaration for the proposed Storm Water Basin Stability and Slope Stabilization.
- SR-1 - Initial Study for the proposed Bolsa Chica Roadway Embankment Reconstruction Project.
- Lower SR-74 Widening - Final EIR.
- Interstate 405 Improvement Project, SR-73 to I-605 proposed project details.
what's happening in District 12
- California Interregional Blueprint
- State Planning & Research Grant (SPR) to Develop Cost-Benefit Tool for Evaluating Park and Ride Lots
- $825 MILLION ALLOCATED TO CREATE JOBS AND IMPROVE TRANSPORTATION
- Caltrans Economic Recovery
- Orange County Freeway Projects
- West County Connector Project
- OC/LA Intercounty Transportation Study
- The Proposition 1B-Transportation Bond
- Strategic Growth Plan Overview and Caltrans Strategic Plan 2007-2012
- California Energy Updates