Lighting requirements for night work in the ROW?

• A. Lighting for night work is optional if workers wear reflective vests.
• B. Adequate illumination for night workers and for visibility of traffic control devices, plus appropriate glare control.
• C. Lighting for night work is required only if there are no reflective vests.
• D. Lighting must be turned off during peak traffic to avoid glare.

Answer: (B)

The key idea is that night work in the ROW must provide lighting that keeps people safe and makes traffic control devices easy to see, while also preventing glare that could blind or distract drivers. That’s why the best answer emphasizes both adequate illumination for workers and for the visibility of traffic control devices, plus proper glare control. Adequate illumination means enough light for workers to perform tasks safely and read signs, while drivers need to be able to spot cones, signs, and barriers from a distance. Glare control matters because lighting that shines directly into drivers’ eyes or into workers’ faces can create dangerous moments; using shielding, proper fixture placement, and appropriate lighting levels helps maintain good visibility without causing glare. Reflective vests alone do not provide lighting or ensure devices are visible at night, and lighting isn’t something you can skip or turn off during peak traffic without increasing risk.