UPDATE (9:25 a.m.): The CHP says westbound lanes of Highway 58 are clear and fully reopened.
UPDATE (8:05 a.m.): The CHP's Bishop office says it is not known when the westbound lanes of Highway 58 near Highway 202 will be fully cleared.
Vehicles are using the right shoulder to travel westbound.
UPDATE (6:10 a.m.): The CHP's Bishop office says the westbound lanes of Highway 58 just west of Highway 202 have been completely shut down following this morning's big rig rollover.
A big rig rollover on Highway 58 near Tehachapi is causing slowing Wednesday morning.
According to the California Highway Patrol, a big rig rolled over just west of Highway 202 a little after 4 a.m.
The CHP reports the big rig spilled its load and an estimated 100 gallons of diesel fuel.
No injuries have been reported, but there is slowing and traffic on westbound 58 is backing up.