Traffic crawls along the northbound 405 freeway during rush hour last spring in Westwood.

Traffic crawls along the northbound 405 Freeway during rush hour in the spring in Westwood.

A portion of the northbound 405 Freeway in the Sepulveda Pass will be closed Saturday night for work on the Mulholland Bridge, authorities said.

Beginning at 11 p.m., all northbound lanes will close from Getty Center Drive to Greenleaf Street/Ventura Boulevard. The connector ramp from the 101 Freeway to the northbound 405 will also close as will three lanes of the southbound 405 to provide a work buffer.

All lanes of the roadway are expected to reopen at 9 a.m. Sunday, according to the Los Angeles County Metropolitan Transportation Authority.

Motorists will be rerouted to Sepulveda Boulevard as a detour. 

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carla.rivera@latimes.com

Twitter: CarlaRiveraLat