What is the appropriate lane for passing on the highway?

The left lane is the appropriate lane for passing on the highway because it is designated for faster-moving traffic and overtaking slower vehicles. When driving on a multi-lane highway, the left lane serves as the passing lane, allowing drivers to safely maneuver around vehicles traveling at a lower speed. This lane facilitates the flow of traffic by keeping slower vehicles to the right, ensuring that those who wish to drive faster can do so with minimal interruption.

Using the left lane for passing helps maintain a smooth and efficient traffic pattern. Drivers are expected to signal when changing lanes and to ensure that it is safe to do so before making the maneuver. This practice contributes to overall road safety, as it reduces confusion and the potential for accidents caused by lane changes in slower or inappropriate lanes. Furthermore, it is important to return to the right lane after completing the pass to keep the left lane clear for other drivers wishing to overtake.