When is it legal to drive in the left lane of a multi-lane road?

It is legal to drive in the left lane of a multi-lane road primarily when passing another vehicle or when the right lane is not available for use. This rule is designed to maintain the flow of traffic and ensure safety on the road. The left lane is generally reserved for faster-moving traffic and overtaking slower vehicles, which helps prevent congestion and encourages a smoother driving experience for everyone.

Driving in the left lane when not passing can lead to frustration for drivers who wish to overtake other vehicles, causing potential hazards or unsafe driving conditions. Moreover, occupying the left lane without a justified reason can result in traffic violations in many jurisdictions. Therefore, adhering to this guideline of using the left lane only for passing or when the right lane cannot be used helps in promoting road safety and efficiency.