Los Angeles

Weekend Lane Closures on I-405 Through Sepulveda Pass Set to Challenge Los Angeles Motorists

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Published on August 23, 2025
Weekend Lane Closures on I-405 Through Sepulveda Pass Set to Challenge Los Angeles MotoristsSource: Instagram/caltransdistrict7

Motorists navigating the I-405 through the Sepulveda Pass are in for months of potential delays, as Caltrans has initiated extensive work that will affect traffic flow every weekend through the early part of next year. According to NBC Los Angeles, lane reductions began yesterday and will involve closures from 10 p.m. on Fridays to 5 a.m. on Mondays, affecting lanes between Victory Boulevard and Sunset Boulevard. In the spirit of preparedness, drivers are advised to allot extra travel time or to seek alternative routes.

During these closures, only three lanes will remain accessible in both the northbound and southbound directions of the 405. This will inevitably influence travelers headed to major destinations like UCLA, Santa Monica, and LAX. An important footnote for those using airport services, the LAX FlyAway service will experience the impact of these changes. Caltrans urges the use of public transportation whenever feasible and will provide detour signage for convenience.

The focus of the closures is to enable crews to carry out a series of improvements, including repaving lanes, updating guardrails and curb ramps, and replacing sign structures. Justified by aims to enhance safety, preserve pavement life, and improve overall ride quality, Caltrans ensures that these temporary inconveniences will reap long-term benefits, as mentioned by NBC Los Angeles.

CALTRANS - District 7 took to Instagram to inform the public about the precise details of the reduction. For those seeking alternative routes, CALTRANS recommends eastbound travel on Santa Monica Boulevard, and north on Sepulveda Boulevard to reach northbound I-405 at Moraga Drive, or northbound on Church Lane, then south on Sepulveda Boulevard to westbound Santa Monica Boulevard for access to southbound I-405. To keep up with the latest alerts concerning the project, motorists can sign up at their dedicated office form link.