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: NB/SB I-405 Falsework Adjustment Closures at Bolsa Avenueopens in a new tab
Tuesday, July 5, 2022
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Closures and Detours
Construction Update: North Gate Road Closureopens in a new tab
Friday, July 1, 2022
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Closures and Detours
EMERGENCY CLOSURE: Westminster Waterline Breakopens in a new tab
Thursday, June 30, 2022
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Weekly Construction Alert
I-405 Improvement Project Construction Alertopens in a new tab
Wednesday, June 29, 2022
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Closures and Detours
Construction Update: Reminder! Fairview Road Bridge Closuresopens in a new tab
Thursday, June 30, 2022
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Milestones and Openings
Now Open: SB I-405 Harbor Boulevard Loop On-Rampopens in a new tab
Tuesday, June 28, 2022
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Closures and Detours
Construction Update: Cadillac Trail Lane Reductions Extendedopens in a new tab
Monday, June 27, 2022
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Closures and Detours
Construction Update: NB I-405 Brookhurst Street On-Ramp Extended Closureopens in a new tab
Monday, June 27, 2022
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Closures and Detours
Construction Update: Warner Avenue Daytime Ramp Closuresopens in a new tab
Monday, June 20, 2022
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Closures and Detours
Construction Update: NB I-405 in Costa Mesa opens in a new tab
Thursday, June 16, 2022
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