The incident occurred on the southbound side of the freeway, just north of the Sunset Boulevard exit around 8:30 a.m.
There were no immediate reports of any injuries. The cause of the incident was not immediately known.
Around 9:30 a.m., the California Highway Patrol said only the No. 4 lane was shut down due to the incident, and it would likely be reopened within an hour. All lanes were reopened shortly before 11 a.m.
SIGALERT CANCELLATION IN LOS ANGELES: SB US-101 NORTH OF SUNSET BLVD -ALL LANES OPEN— CHP PIO - LA County (@CHPsouthern) February 8, 2019