Highway 41 is closed at the Hwy 41/46 intersection in northern San Luis Obispo County, also known as the "Cholame Y", due to an overturned truck.
The crash happened at about 1 p.m. on northbound Highway 41 just north of Highway 46.
According to the California Highway Patrol, a dump truck overturned off the highway.
The roadway is expected to be closed until 6 p.m.
In the meantime, traffic is being diverted to Highways 46 and 33.
