When you are driving in heavy fog you should:

When you are driving in heavy fog you should:

• A. Turn on your high beams
• B. Stop on the shoulder
• C. Speed up to pass through quickly
• D. Reduce your speed and use low beam headlights or daytime running lights

Answer: (D)

In heavy fog, visibility is drastically reduced, so you must slow down and make yourself as visible as possible. High beams are not helpful here because the light reflects off the fog droplets and creates glare, which actually makes it harder to see and harder for other drivers to see you. Slowing down gives you more time to react to anything that appears suddenly in the limited view. Using low beam headlights is the safer, effective choice because they cast light downward onto the road and reduce glare, helping you see the lane markers and obstacles while also making your vehicle more visible to others. If your car has daytime running lights, they can help with visibility, but they should be used in addition to low beams for best effect in foggy conditions. Stopping on the shoulder is risky in fog and not a reliable fix, and speeding up would further decrease your ability to react to hazards you can’t clearly see.

In heavy fog, visibility is drastically reduced, so you must slow down and make yourself as visible as possible. High beams are not helpful here because the light reflects off the fog droplets and creates glare, which actually makes it harder to see and harder for other drivers to see you. Slowing down gives you more time to react to anything that appears suddenly in the limited view. Using low beam headlights is the safer, effective choice because they cast light downward onto the road and reduce glare, helping you see the lane markers and obstacles while also making your vehicle more visible to others. If your car has daytime running lights, they can help with visibility, but they should be used in addition to low beams for best effect in foggy conditions. Stopping on the shoulder is risky in fog and not a reliable fix, and speeding up would further decrease your ability to react to hazards you can’t clearly see.