BAKERSFIELD, Calif. - 2ND UPDATE: All lanes of Round Mountain Road are now back open.
UPDATE: One lane of traffic on Round Mt. Road is now back open.
An overturned cement truck has shut down traffic in northeast Bakersfield.
The accident happened at about 3:15 a.m. and has blocked all lanes of Round Mountain Road near Choctaw Valley.
California Highway Patrol officers are on scene working to clear the roadways.
There's no word yet on when traffic will re-open.