California's Move Over law requires:

Question

If an emergency vehicle with its lights on is stopped on the side of the road, California drivers are required to vacate the lane directly next to the vehicle, if possible. If a driver cannot move over safely, they must slow down and proceed with caution. This law also applies when approaching a stopped tow truck or Department of Transportation vehicle.

Accepted Answer

All vehicles to vacate the lane closest to an emergency vehicle that is stopped with its lights flashing.

Answer

All vehicles to stay in the right lane at all times.

Answer

Trucks to use the left lane.