When driving in fog, you should use your:

• A. High beams.
• B. Low beams.
• C. Parking lights.
• D. Hazard lights.

Answer: (B)

In fog, visibility is greatly reduced, and glare from lights can make conditions worse. Low beams are best because they point the light toward the road ahead at a shorter distance, reducing the amount of light that reflects back from the fog and washing out your view. High beams, by contrast, bounce off the fog and create a bright glare that makes it harder to see what’s in front of you. Parking lights are far too dim to help you navigate safely, and hazard lights are intended for signaling an unusual or stopped vehicle, not for normal driving in fog. If your car has dedicated fog lights, use them in conjunction with your low beams when visibility is poor, but keep low beams as your primary lighting.