You may not make a U-turn when you cannot see at least _________ feet from the crest (top) of a hill or turn.

When considering the ability to make a U-turn, it is crucial to ensure that you have sufficient visibility to safely complete the maneuver without endangering yourself or other road users. The law states that U-turns should not be made when a driver cannot see at least 500 feet from the crest of a hill or around a turn. This distance is set to provide ample visibility to spot oncoming traffic or any obstacles that may be present.

Visibility of 500 feet gives drivers a clear view of the road ahead, allowing them to gauge the safety of making a U-turn. If visibility is less than this distance, drivers risk encountering vehicles or hazards that they wouldn't have time to react to, leading to potential accidents. Therefore, adhering to this specific distance is essential for maintaining safe driving practices and improving overall road safety.