A portion of Highway 1 in Orcutt was blocked in both directions by a crash Thursday morning involving two trucks.
It happened just before 10 a.m. near Solomon Road.
A Sigalert has been issued for the area and drivers are encouraged to use Highway 135 as a detour.
Caltrans reports one of the trucks overturned and a second vehicle was involved.
It was not immediately known when the highway through the area would reopen or if anyone was injured in the crash.