Final answer:
The headlights of a car must be on low beam within 500 feet when following another vehicle.
Step-by-step explanation:
The headlights of a car must be on low beam within 500 feet when following another vehicle. This is to ensure that the high beam headlights do not blind the driver of the vehicle in front of you. Low beam headlights provide adequate but less intense illumination to allow for safe driving without causing discomfort or impairing the vision of other drivers.