Construction Updates
OCTA in cooperation with Caltrans is widening the San Diego Freeway (I-405) between SR-73 and I-605. The project will improve 16 miles of I-405 between the SR-73 freeway in Costa Mesa and I-605 near the L.A. County line.
View Closures & Detours
Bridge Milestones
The bridges highlighted below have recently reached a significant project milestone.
All Bridge Information
For information about a specific bridge:
Latest Activity
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Closures and Detours
Construction Update: SB I-405 Magnolia Loop On-Ramp Closureopens in a new tab
Thursday, May 6, 2021
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Weekly Construction Alert
I-405 Improvement Project Construction Alert: Week of May 3opens in a new tab
Wednesday, May 5, 2021
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Closures and Detours
Construction Update: NB I-405 Westminster On-Ramp Closureopens in a new tab
Tuesday, May 4, 2021
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Closures and Detours
Construction Update: Ward Activitiesopens in a new tab
Monday, May 3, 2021
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Closures and Detours
Construction Update: Magnolia Activitiesopens in a new tab
Monday, May 3, 2021
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Closures and Detours
Construction Update: NB/SB I-405 Closures Continue for Warner Utility Workopens in a new tab
Friday, April 30, 2021
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Closures and Detours
Construction Update: NEW! Falsework Activity for SB 405 Bridge Over the Railroadopens in a new tab
Friday, April 30, 2021
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Closures and Detours
Construction Update: SB Magnolia Street Sidewalk Closureopens in a new tab
Thursday, April 29, 2021
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Closures and Detours
Construction Update: UPDATE! NB/SB I-405 Closures for Warner Utility Workopens in a new tab
Friday, April 23, 2021
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Ward Street Construction Update
Recorded Ward Street Virtual Neighborhood Meetingopens in a new tab
Wednesday, April 7, 2021
English: If you have questions, please
contact the Outreach
Team by calling
888-400-8994
Español: Para obtener
más
información sobre
el Proyecto de Ampliación en el I-405, llame al 888-400-8994
Tiếng Việt: Để
biết
thêm thông tin về Dự Án Cải Thiện Xa Lộ
I-405, vui lòng liên hệ với Gia Ly theo số 888-662-6569