What should flaggers do if they encounter adverse weather conditions?

• A. They should postpone all work until weather improves.
• B. They should stand still and wait for instructions.
• C. They should be prepared and know how to perform their duties under those conditions.
• D. They should rely on radios exclusively during adverse weather.

Answer: (C)

Adverse weather requires staying proactive and ready to adapt how you manage traffic. The safest and most effective approach is to be prepared and know exactly how to perform your duties under those conditions. This means understanding how rain, wind, fog, or lightning affect visibility, signaling effectiveness, and driver behavior, and applying the worksite plan with weather-specific adjustments. You stay visible and properly positioned, use the right PPE, and communicate according to established procedures so you can continue guiding motorists safely or pause as the plan dictates. Radios help, but you shouldn’t rely on them exclusively; actions should follow the approved procedures. Simply postponing everything or standing still waiting for new instructions isn’t the right default—you act within the weather plan to protect workers and the traveling public.