What should you do in heavy fog?

• A. Stop in the middle of the road
• B. Speed up to pass quickly
• C. Use high beams for better visibility
• D. Slow down, use low beams (or fog lights), and increase following distance; use lane positioning; turn on hazard lights only if necessary

Answer: (D)

In heavy fog the main goal is to preserve visibility and control. Slow down so you have more time to react to anything that appears in front of you. Use low beams or fog lights if you have them, because high beams push light back into the fog and create glare that makes it harder to see. Increase the following distance so you can stop safely if something slows or stops ahead, since your reaction time is reduced in fog. Keep to your lane by watching the lane markings and staying centered, which helps others know where you’re going and reduces the risk of drifting. Use hazard lights only if you must warn other drivers due to a stop or breakdown; they’re not helpful to use while actively moving in fog and can confuse other drivers. If conditions are too foggy to drive safely, find a safe place to pull over and wait for visibility to improve.