What is the primary requirement of the right lane rule?

Answer: B — Must drive in right-hand lane or as close as possible to the right curb

The primary requirement of the right lane rule is that drivers must operate their vehicles in the right-hand lane or as close as possible to the right curb. This rule is in place to ensure that traffic flows smoothly and safely, particularly on multi-lane roadways. By keeping to the right, it allows faster-moving vehicles to pass on the left, which is especially important for larger vehicles such as trucks. This practice minimizes conflicts and enhances roadway efficiency, creating a safer environment for all road users. Other options may suggest alternative driving practices, such as using the left lane for overtaking or only being in the right lane at specific times, but they do not align with the fundamental principle of maintaining right-lane adherence as a means of promoting order on the roads. The right lane rule encourages responsible driving habits and helps maintain a steady traffic flow, thus enhancing safety for everyone on the road.