In fog, what should you do?

• A. Switch to high-beam headlights only.
• B. Avoid using any lights.
• C. Drive at full speed to pass through quickly.
• D. Use lights in fog and drive carefully.

Answer: (D)

Fog makes it hard for others to see you and for you to see the road. To stay safe, switch on your lights so you’re visible and can see better. Don’t use high‑beam headlights in fog because the light reflects off the droplets and actually reduces your visibility. You should also slow down and leave extra space between you and the vehicle in front, giving yourself more time to react to hazards that may appear suddenly. If visibility is seriously reduced, use the appropriate lights for the conditions (dipped headlights, and fog lights if fitted and required), and continue with careful, cautious driving. So the best approach is to use lights in fog and drive carefully.