LOS ANGELES, CA — Traffic will be impacted on the 405 Freeway and nearby roads beginning Friday when construction will shut down several lanes and ramps of the interstate in the San Fernando Valley for the entire weekend.
Here's a look at the closures, planned for 10 p.m. Friday, Aug. 7 through 5 a.m. Monday, Aug. 10:
Officials urged drivers to consider the following alternate routes:
Northbound 101 to southbound 405: Exit at Sepulveda Boulevard and head south on Sepulveda Boulevard to the Sepulveda Boulevard on-ramp to the southbound 405.
Southbound 101 to southbound 405: Exit at the Van Nuys Boulevard off-ramp, head south on Van Nuys Boulevard, west on Ventura Boulevard and south on Sepulveda Boulevard to the Skirball Center Drive/Sepulveda Boulevard on-ramp to the southbound 405.
Construction has been underway on the 405 Freeway in and near the Sepulveda Pass since June 2025 as part of the I-405 Pavement Rehabilitation Project, a $143.7 million project to improve safety and mobility along the freeway and extend the life of its pavement, according to Caltrans.
Many of the associated road closures occur overnight. But big traffic headaches have come courtesy of what Caltrans calls Extended Weekend Closures — that's when crews shut down lanes and/or ramps on Friday night and keep them closed until Monday morning.
Those weekend-long closures will happen at a pace of about every other week — or twice a month.
Caltrans does not have a finalized schedule for each weekend-long closure, but said there will be about 25 total weekend-long closures.
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