LA Mobilizes I-405 Rehab to Strengthen Corridor

Northbound I-405 reduced to 3 lanes through Sepulveda Pass for $143.7M pavement project

I-405 Cuts to 3 Lanes in Sepulveda Pass April 2026

Drivers who use northbound I-405 through the Sepulveda Pass will face major lane reductions starting in April 2026, the California Department of Transportation announced. The extended weekend closures will reduce the freeway to three lanes between Skirball Center Drive and Ventura Boulevard, with the first closure scheduled from 10 p.m. Friday, April 10, through 5 a.m. Monday, April 13, 2026. Approximately 25 weekend lane reductions are planned for the project, occurring roughly every two weeks.

Context & Background

The lane reductions are part of the I-405 Pavement Rehabilitation Project, which applies $143.7 million toward improving safety and mobility between Van Nuys and Westwood. Caltrans said the work addresses aging pavement along one of Southern California's most heavily traveled corridors. The project involves extended weekend closures rather than continuous restrictions to minimize weekday commuter impacts. Officials said the schedule is subject to change due to weather or operational reasons.

Key Details

During each closure period, northbound I-405 will operate with just three lanes through the Sepulveda Pass section. The Skirball Center Drive on-ramp to northbound I-405 will be closed during closure periods, requiring drivers to use alternate access points. Southbound I-405 won't be impacted during the April 10-13 closure or subsequent weekend work periods. Residents and businesses near construction areas may experience noise, vibrations, and dust during the extended weekend work sessions.

Timeline & Implementation

The first weekend closure begins at 10 p.m. Friday, April 10, 2026, and continues through 5 a.m. Monday, April 13, 2026. The remaining 24 weekend lane reductions will occur roughly every two weeks throughout the project duration. Caltrans said motorists are strongly encouraged to seek alternate routes and explore public transportation options during closure periods.

Rider Impact & Moovit

The lane reductions will create significant traffic disruptions along the major corridor connecting the San Fernando Valley and West Los Angeles. Drivers should expect delays and plan extra travel time during weekend closure periods. Moovit provides real-time transit updates and trip planning for Los Angeles-area public transportation options that can help commuters avoid freeway congestion during construction.