What is the minimum distance from which retroreflective vests must be visible?

The minimum distance from which retroreflective vests must be visible is 1000 feet. This is essential for ensuring safety in high-traffic areas, particularly for flaggers directing traffic around road construction sites or other hazardous locations. The visibility requirement is set to ensure that workers are seen by oncoming drivers from a substantial distance, allowing vehicles adequate time to react and navigate safely around them.

The 1000-foot visibility standard helps reinforce the importance of bright, reflective clothing for flaggers, as it significantly reduces the risk of accidents. This distance provides an increased margin for safety, particularly in low-light conditions or during adverse weather, where visibility may be further reduced.