What is the minimum distance that warning flags or flares must be visible in the dark?

The correct answer is that warning flags or flares must be visible from a minimum distance of 500 feet in the dark. This regulation is in place to ensure that drivers can see warning signals from a significant distance, allowing them ample time to react to potential hazards on the road. Visibility is crucial for safety, particularly in low-light conditions, where adequate distance can mean the difference between avoiding an accident and encountering unforeseen dangers.

Establishing a distance requirement of 500 feet helps ensure that flares or flags can alert approaching drivers early enough to take necessary precautions. The visibility of these signals is very important to maintain safety for both the drivers and any personnel operating in or around the affected area. Other distances presented as options (200 feet, 300 feet, and 400 feet) may not provide sufficient reaction time for drivers approaching the warning area, thereby raising the risk of accidents.