Move Over America
Chapter 4 of Division 11 of the California Vehicle Code - 21809 (a)
A person driving a vehicle on a freeway approaching a stationary authorized emergency vehicle that is displaying emergency lights, or a stationary tow truck that is displaying flashing amber warning lights, shall approach with due caution and, before passing in a lane immediately adjacent to the authorized emergency vehicle or tow truck, absent any other direction by a peace officer, proceed to do one of the following:
(1) Make a lane change into an available lane not immediately adjacent to the authorized emergency vehicle or tow truck with due regard for safety and traffic conditions, if practicable and not prohibited by law.
(2) If the maneuver described in paragraph (1) would be unsafe or impracticable, slow to a reasonable and prudent speed that is safe for existing weather, road, and vehicular or pedestrian traffic conditions.