At what height must the red reflex reflectors on vehicles be located?

Answer: C — 15 to 60 inches

The correct height for red reflex reflectors on vehicles is between 15 to 60 inches. This regulation ensures that the reflectors are positioned at a level where they can effectively reflect light from oncoming vehicles, enhancing visibility and safety during low-light conditions. By having reflectors within this specified range, the risk of collisions is reduced, as drivers are more likely to see the vehicle from a distance. This height criterion is designed to accommodate various vehicle types while providing optimal visibility to other road users. Positioning reflectors too low could hinder their effectiveness, especially for larger vehicles, while positioning them too high might make them less visible to typical passenger vehicles. Hence, the 15 to 60 inches range strikes a balance to maximize safety on the road.