OCTA in cooperation with Caltrans is improving 16 miles of the San Diego Freeway (I-405) between State Route 73 (SR-73) and Interstate 605 (I-605). It also will construct the 405 Express Lanes from SR-73 to I-605. The new express lanes – incorporating the existing carpool lanes and connectors that opened in 2014 – will be two lanes in each direction.
View Closures & Detours:
Bridge Milestones
The bridges highlighted below have recently reached a significant project milestone.
Now Open
Heil Avenue Pedestrian Bridge
Complete
Improvements
Newly improved bridge
LED lighting for nighttime use
Now Open
Westminster Boulevard
- Complete
Improvements
- Newly improved bridge
New bike lanes on both sides of the bridge- New westbound sidewalk
Now Open
Edinger Avenue
- Complete
Improvements
- Newly improved bridge
- New westbound sidewalk
- New bike lanes on both sides of the bridge
Now Open
Magnolia Street
- Complete
Improvements
- Two new lanes of travel
- New bike lanes on both sides of the bridge
- New northbound sidewalk
Now Open
Talbert Avenue
- Complete
Improvements
- Two new lanes of travel
- New bike lanes on both sides of the bridge
Now Open
McFadden Avenue
- Complete
Improvements
- Two new lanes of travel
- New bike lanes on both sides of the bridge
- New eastbound sidewalk
In Progress
Brookhurst Street
- Phase 1 Complete
- Bridge Open to Traffic During Construction
Improvements
- Newly improved bridge
- New bike lanes on both sides of the bridge
In Progress
Bolsa Avenue
- Phase 1 Complete
- Bridge Open to Traffic During Construction
Improvements
- Two new lanes of travel
- New bike lanes on both sides of the bridge
- New westbound sidewalk
In Progress
Bolsa Chica Road
- Phase 1 Complete
- Bridge Open to Traffic During Construction
Improvements
- Four new lanes of travel
- New bike lanes on both sides of the bridge
In Progress
Goldenwest Street
- Phase 1 Complete
- Bridge Open to Traffic During Construction
Improvements
- Three new lanes of travel
- New bike lanes on both sides of the bridge
- New southbound sidewalk
All Bridge Information
For information about a specific bridge:Social Media Feed
Latest Activity
Weekly Construction Alert
Milestones and Openings
Milestones and Openings
Friday, October 21, 2022
Inside the 405 Video Series
Inside the 405 Video Series
Friday, October 21, 2022
Milestones and Openings
Milestones and Openings
Wednesday, October 19, 2022
Inside the 405 Video Series
Inside the 405 Video Series
Friday, October 14, 2022
Milestones and Openings
Milestones and Openings
Friday, October 14, 2022
Closures and Detours
Closures and Detours
Tuesday, October 11, 2022.
Construction Update: REMINDER SB I-405 Off-Ramp to Seal Beach Blvd
Inside the 405 Video Series
Closures and Detours
Inside the 405 Video Series
Inside the 405 Video Series
Friday, September 30, 2022
Contact the 405 Community Outreach Team
If you have questions, please contact the Outreach Team by calling 888-400-8994
Para obtener más información sobre el Proyecto de Ampliación en el I-405, llame al 888-400-8994
Để biết thêm thông tin về Dự Án Cải Thiện Xa Lộ I-405, xin vui lòng liên lạc cô Gia Lý theo đường dây tiếng Việt 888-662-6569
