Large Trucks in the Left Lane
California sees a particularly large number of commercial trucks on its roadways. For this reason, the state has enacted somewhat strict rules when it comes to large trucks on the highway. California is one of few states with a law that prohibits “motor trucks, truck tractors with three axles or more, and truck tractors pulling vehicles” from driving in the left-hand lane while on the highway. These slower-moving vehicles must remain in the right-hand lane or the second-right-hand lane if on a highway with four lanes of traffic moving in the same direction.
If a large truck disobeys lane restrictions, the driver could receive fines of up to $250 for a third offense within one year. Any slower-moving vehicle, regardless of size, must use the furthest right-hand lane while driving in California, except when passing or making a left turn. The California Highway Patrol enforces truck lane restrictions and will stop large trucks should they disobey the law.