On multi-lane roads with two or more lanes of travel in the same direction, when is it legal to pass on the right?
Answer: C — The left lanes are clear of traffic to pass
On a road with two or more lanes in the same direction, you may pass on the right only when there is a safe, unobstructed right-hand lane available to overtake in. The left lanes must be clear of traffic so you have room to move over, pass the slower vehicle, and then merge back safely without forcing others or entering a blind spot. If the left lanes are crowded, there isn’t a safe path to pass on the right, so it isn’t legal.