Final answer:
Drivers should use the right lane on two-lane freeways except when passing another vehicle, to avoid congestion, and to allow for safer merges at exit ramps or intersections.
Step-by-step explanation:
On two-lane freeways, drivers should use the right lane except when passing another vehicle. It is considered proper lane etiquette and a matter of safety to stay in the right lane and only use the left lane for passing, to promote the smooth flow of traffic. Using the right lane for regular travel also helps avoid congestion and allows for safer merging for vehicles entering and exiting the freeway. When driving under the speed limit, drivers should also stay in the right lane so faster traffic can pass safely on the left. Avoiding exit ramps and approaching intersections are other situations where a driver might need to switch lanes, but the general rule is to stay right unless passing or preparing to exit the freeway.