Why is high-visibility clothing required for rail workers?

High-visibility clothing is required for rail workers primarily to ensure they stand out in low-light conditions. This type of clothing is designed with bright colors and reflective materials, helping workers be easily seen by operators of trains and other equipment, especially during dusk, dawn, or in dark environments. This visibility is crucial for maintaining safety as it reduces the risk of accidents, as workers are often located near moving trains and machinery. Enhanced visibility is a key factor in preventing accidents in areas where the risk of collision or injury is high, ensuring the safety of workers on the tracks.