A multi-vehicle crash was causing a major traffic backup on Highway 101 in northern San Luis Obispo County Tuesday morning.
The crash happened around 7:39 a.m. in the southbound lanes just south of Highway 58.
Initial reports into the California Highway Patrol were that at least four vehicles were involved.
All lanes were open by 8:35 a.m., but Caltrans warned drivers to expect delays for a while.
No injuries were reported.
