When is it legal to pass another vehicle on the right while riding a motorcycle?

Passing another vehicle on the right while riding a motorcycle is legal specifically under certain conditions to ensure safety and compliance with traffic laws. The correct answer indicates that it is permissible when there is a designated lane for motorcycles or when the vehicle being passed is turning left.

In situations where a designated lane exists, such as lane splitting or motorcycle lanes, this allows motorcyclists to safely maneuver around slower-moving or stopped vehicles. Additionally, if another vehicle is signaling to turn left, that vehicle is expected to yield to the traffic behind it, making it safe for a motorcycle to pass on the right.

This practice is grounded in the principles of traffic safety, as it minimizes the risk of accidents by encouraging motorcyclists to ride in a manner that is predictable for other drivers. While there are other circumstances stated in the other options, they either do not comply with traffic regulations or do not consider safety effectively.