On a two-lane freeway, when is it appropriate to drive in the left lane?

Driving in the left lane of a two-lane freeway is primarily intended for passing other vehicles. This practice enhances traffic flow and safety by allowing slower-moving vehicles to remain in the right lane, thereby reducing congestion in the left lane. When you use the left lane to overtake another vehicle, it helps maintain a smooth flow of traffic by encouraging drivers to adhere to lane discipline.

The left lane should be vacated once the pass is complete, as frequent and unnecessary use of this lane for other reasons—like being present during rush hour, having no vehicles around, or navigating a closed right lane—can lead to unsafe driving conditions and may impede faster-moving traffic. Using the left lane primarily for passing supports the effective functioning of the road system and reduces the risk of accidents.