What is the primary purpose of the left lane on a highway?

Answer: B — To facilitate passing other vehicles

The primary purpose of the left lane on a highway is to facilitate passing other vehicles. This lane is typically designated for faster-moving traffic, allowing drivers to safely overtake slower vehicles in the right lane. When using the left lane, it is important to maintain a higher speed relative to the traffic in the right lane, ensuring a smooth flow of traffic while minimizing disruptions. This practice helps keep the right lane available for slower vehicles, enhancing the overall efficiency and safety of highway travel. Understanding this purpose is crucial for both safe driving and effective navigation on multilane highways, as it helps prevent congestion and accidents that may arise from improper lane usage.