In fog, which driving approach maximizes visibility?

• A. Use high beams only.
• B. Increase following distance but keep high beams on.
• C. Reduce speed, increase following distance, use low beams and fog lights if available.
• D. Stop and wait for visibility to improve.

Answer: (C)

Fog makes light scatter and creates glare, so your goal is to see the road without adding more glare. Slow down to give yourself more time to react, and increase the distance to the vehicle in front so you have enough space to stop if visibility suddenly worsens. Use low beams rather than high beams; low beams illuminate the road ahead without bouncing into the fog, and fog lights (if you have them) help by lighting the area closest to your vehicle. High beams reflect off the fog and reduce visibility, which is why they’re not helpful here. Stopping and waiting for visibility to improve isn’t practical; the safer move is to proceed slowly with proper lighting and a larger following distance.