In what situation is it permissible to drive in the left lane on a multi-lane road?

Driving in the left lane on a multi-lane road is primarily intended for passing slower vehicles. This practice is based on the principle that the left lane is reserved for faster-moving traffic to facilitate safe and efficient travel. When you encounter slower vehicles in the right lane, moving to the left lane allows you to pass them safely while maintaining the flow of traffic.

Using the left lane solely out of a sense of urgency, for cruising at a consistent speed, or assuming there are no restrictions disregards the general rule of road courtesy and can lead to traffic congestion or unsafe driving conditions. Therefore, the proper and responsible use of the left lane is when passing slower vehicles, ensuring that all drivers can navigate the road effectively.