Both directions of the Altamont Pass have reopened after an overnight crash sparked a grass fire in the Livermore area, said the California Highway Patrol.
Authorities reported that a pickup truck collided into the median, causing the fire on Interstate 580.
CHP issued a sig-alert and shut down both directions of the highway.
The Alameda County Fire Department called in additional firefighters because flames had jumped the freeway and started a vegetation fire.
The CHP was able to reopen lanes 3 and 4 in each direction, but there was still a traffic jam.
Authorities reopened all lanes just before 4 a.m.
People driving from Tracy to the East Bay were diverted at West Grant Line Road, while drivers going from Livermore to Tracy, were diverted at North Flynn Road.