To drive in fog you should?

• A. Slow down, use low-beam headlights or fog lights, increase following distance, and use the road’s edge lines as a guide.
• B. Speed up to pass through quickly.
• C. Use high-beam headlights.
• D. Turn off headlights.

Answer: (A)

When visibility is reduced by fog, the safest approach is to adjust speed, lighting, following distance, and lane guidance. Slowing down gives you more time to react and stop as sight distance shrinks. Use low-beam headlights or fog lights to illuminate the road without reflecting off the fog; high beams create glare and actually reduce visibility. Increase the following distance so you have extra space to react if the car ahead slows or stops unexpectedly. Use the road’s edge lines as a guide to stay in your lane since center lines may be hard to see; if visibility is very poor, pull over to a safe spot and wait for conditions to improve.