What is the best way to maintain visibility in fog?

• A. Stop and wait for fog to clear.
• B. Reduce speed, increase following distance, use low beams, and use fog lights if available.
• C. Use high beams.
• D. Speed up to pass through fog quickly.

Answer: (B)

Fog makes it hard to see far ahead and can cause headlights to create glare. The best approach is to slow down and give yourself more space to react, while using lighting that helps you see and be seen without bouncing light back at you. Reducing speed lowers the chances of hitting unexpected hazards, and increasing following distance gives you extra time if the car in front slows or stops suddenly. Using low beams shines light onto the road without reflecting off the fog, making it easier to see lane markings and obstacles, and, if available, fog lights mounted closer to the ground can illuminate the road surface and edges more effectively. High beams, by contrast, spray light into the fog and reflect back, reducing visibility. Stopping and waiting is not inherently wrong if visibility is extremely poor, but when you can proceed safely, continuing slowly with proper lighting is usually the better balance of visibility and progress. Speeding through fog drastically reduces your ability to react and is unsafe.