Drivers crossing the Sepulveda Pass on the 405 Freeway will lose up to four lanes in each direction every night from Monday, Sept. 14, through Saturday, Sept. 19.

Caltrans began overnight closures Sept. 14 and will continue them nightly from 9 p.m. to 6 a.m. through Sept. 19, the Palisades News reported. The work is part of a $143.7 million pavement rehabilitation project covering 10.2 miles of Interstate 405 between Van Nuys and Westwood.

Speed limits drop to 55 mph in the construction zone.

What's closing each night:

Northbound, up to four lanes shut down from Wilshire Boulevard to Skirball Center Drive and Mulholland Drive. Southbound, up to four lanes close from U.S. Route 101 to Skirball Center Drive and Mulholland Drive.

Several ramps close as well. Northbound on-ramps at Wilshire Boulevard (eastbound and westbound), Sunset Boulevard, Moraga Drive and Burbank Boulevard will be closed. Northbound off-ramps at Sunset Boulevard, Moraga Drive and Getty Center Drive will also shut down.

On the southbound side, off-ramps and on-ramps at Sepulveda Boulevard and Ventura Boulevard close nightly, along with the southbound Burbank Boulevard on-ramp. The northbound U.S. 101 connectors to both directions of the 405 will be closed as well.

The bigger project:

Construction on the 405 through the pass has been underway since June 2025, according to Patch. The project replaces pavement sections in two lanes each direction from Victory Boulevard to Mulholland Drive, restoring nearly 92 lane miles overall, according to Caltrans' project page. The freeway will not be widened.

A joint venture between CA Rasmussen, Inc. and FBD Vanguard Construction, Inc. is the contractor. Caltrans projects completion in winter 2027, with plant establishment extending into 2028.

Beyond nightly work, Caltrans has planned about 25 extended weekend closures over the life of the project. Those run roughly 55 hours, from about 10 p.m. Friday to about 5 a.m. Monday. No weekend closures will overlap with the 2026 World Cup or the 2027 Super Bowl.

Residents and businesses near the corridor may experience noise, vibrations and dust during construction, MyNewsLA reported, citing Caltrans.

Caltrans advises drivers to plan extra travel time or find alternate routes. Real-time lane information is available at quickmap.dot.ca.gov. Drivers can also sign up for weekly email alerts about construction schedules on the Caltrans project page.