The incident occurred shortly after 6 a.m. north of Las Flores Canyon Road. The California Highway Patrol said the duration of the closure was not known.
A downed power pole and wires were seen on the roadway near the wreck. It was not known if anyone was injured in the crash.
Traffic on PCH was backed up for miles in both directions. Lanes began reopening around 8 a.m.
SIGALERT CANCELLATION IN MALIBU: NB SR-1 AT LAS FLORES CANYON ROAD - ALL LANES OPEN— CHP PIO - LA County (@CHPsouthern) March 29, 2017