A single-vehicle rollover crash slowed traffic on Cliff Drive near Las Positas Road Saturday afternoon.
Initial reports indicated that the driver of the vehicle was able to get out of the vehicle but passenger was trapped inside.
At about 2:45 p.m., emergency crews responded to the scene and blocked off the the area where the crash occurred. Westbound traffic on Cliff Drive was told to turn back around.
At around 3:15 p.m., traffic was reopened with officers directing a single westbound lane.
It is unclear if any injuries occurred in the crash.