55-hour lane closures start at 10 p.m. Friday, August 8, 2025
Los Angeles — Caltrans announces the start of a series of extended weekend lane reductions along Interstate 405 (I-405) through the Sepulveda Pass. The freeway will be reduced to at least three lanes in each direction and motorists are strongly encouraged to seek alternate routes and explore public transportation options to reach their destinations.
The work will start at 10 p.m. Friday, August 8, through 5 a.m. Monday, August 11. Motorists traveling along I-405 will experience the following lane reductions and closures:
Northbound Interstate 405
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Northbound I-405 will be reduced to three lanes between Santa Monica Boulevard to just north of Sunset Boulevard
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Santa Monica Boulevard on-ramp closed
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Wilshire Boulevard off-ramp closed
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Eastbound and westbound Wilshire Boulevard on-ramps to northbound I-405 closed
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Sunset Boulevard on/off-ramps closed
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Sepulveda Boulevard/Moraga Drive off-ramp closed
Southbound Interstate 405
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Southbound I-405 will be reduced to three lanes just north of Sunset Boulevard to eastbound Wilshire Boulevard
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Sunset Boulevard/Church Lane on/off-ramps closed
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Westbound Wilshire Boulevard on-ramp to southbound I-405 closed
Alternate Routes for I-405
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Santa Monica Boulevard to northbound I-405: Travel east on Santa Monica Boulevard and north on Sepulveda Boulevard to the on-ramp to northbound I-405 at Moraga Drive
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Sunset Boulevard to southbound I-405: Travel north on Church Lane, south on Sepulveda Boulevard, west on Santa Monica Boulevard to the on-ramp to southbound I-405
Extended weekend closures will occur every two weeks along various sections of I-405 throughout the project duration. Due to weather or operational reasons, the schedule is subject to change including the times and dates of closures, the number of lanes closed and other details.
Residents and businesses located near construction may experience noise, vibrations and dust associated with construction activities. Please visit the Caltrans Quickmap for current road conditions.
This work is part of the I-405 Pavement Rehabilitation Project between the Los Angeles communities of Van Nuys and Westwood along the Sepulveda Pass. This project will apply about $143.7 million toward improve the safety and mobility along I-405 between Van Nuys and Westwood as well as sustainably extend the pavement life.
For more information on the project visit the project webpage.
Caltrans reminds drivers to “Be Work Zone Alert” and to “Slow for the Cone Zone.”
