Bel Air and Holmby Hills residents who use the I-405 to reach the Westside or San Fernando Valley will lose access to key ramps and lanes five consecutive nights, as Caltrans crews install concrete K-rail barriers along the Sepulveda Pass starting Monday, July 13.

The closures run nightly from 9 p.m. to 6 a.m. through Friday, July 17. The Getty Center Drive off-ramp, the Sepulveda Boulevard on-ramp, and the Burbank Boulevard on-ramp will all shut completely during work hours, according to Caltrans District 7.

Those three ramps are the closest freeway access points for Bel Air and Holmby Hills residents.

What's closing

Northbound: Up to two lanes closed in three segments between Wilshire Boulevard and Victory Boulevard, including the stretch from Wilshire to Skirball Center Drive/Mulholland Drive.

Southbound: Up to three lanes closed from U.S. 101 to Skirball Center Drive/Mulholland Drive, and up to two lanes closed from Skirball Center Drive south to Wilshire Boulevard.

Connectors: Both the northbound and southbound U.S. 101 connectors to southbound I-405 will be closed.

At least two lanes will remain open in each direction throughout the work.

Detour options

Caltrans officials recommend U.S. 101 or local canyon passes, including Laurel Canyon, Coldwater Canyon, and Topanga Canyon, for drivers traveling between the Valley and the Westside overnight. Real-time conditions are available at quickmap.dot.ca.gov.

The bigger project

The closures are part of the $143.7 million I-405 Sepulveda Pass Pavement Rehabilitation Project, which covers 10.2 miles between Van Nuys and Westwood. A joint venture of C.A. Rasmussen Inc. and FBD Vanguard Construction Inc. began work in June 2025, with completion expected in winter 2027, according to the Caltrans project page.

Matthew Osborne, C.A. Rasmussen's project manager, told Construction Equipment Guide the corridor is "one of the heaviest-traveled in California," noting the pavement had been deteriorating with cracking and rutting across several areas.

The contractor yard sits at the Skirball Yard off Mulholland Drive, near American Jewish University, directly adjacent to both neighborhoods. Nighttime construction noise is limited to 86 decibels at 50 feet under the project's noise specifications, according to Caltrans. That's roughly equivalent to heavy traffic or a blender.

The 55 mph speed limit through the construction zone, in effect since Tuesday, May 26, will remain through early spring 2027, according to Caltrans. The agency has planned 25 extended weekend closures over the project's roughly 20-month life.

Get closure alerts

Residents can sign up for weekly construction-schedule emails through Caltrans at lp.constantcontactpages.com/sl/iF8BRAC/405. Caltrans District 7 also posts advance closure notices on its social media accounts.