LOS ANGELES, CA — Traffic will once again 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 Sepulveda Pass and San Fernando Valley for the entire weekend.
Additional closures are planned overnight beginning Monday, Sept. 28.
Here's a look at the weekend-long closures, planned for 10 p.m. Friday, Oct. 2 through 5 a.m. Monday, Oct. 5:
Lanes will be open as normal on the northbound freeway. All connectors between the 101 and 405 freeways are expected to remain open.
Additional closures are also planned overnight earlier in the week, from 9 p.m. to 6 a.m. through Friday morning.
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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