Which practice uses road edge lines as a guide?

• A. Driving in fog with low-beam headlights, increased following distance, and using road edge lines as guide.
• B. Use high-beam headlights in fog.
• C. Drive close to the center of the lane to feel the road.
• D. Ignore edge lines altogether.

Answer: (A)

Fog reduces visibility, so the best approach is to rely on the visible cues that define your lane. Using the road edge lines as a guide helps you stay centered in the lane and prevents drifting toward the edge, which is crucial when you can’t see far ahead. In fog, low-beam headlights are used to minimize glare and improve contrast with the road; high beams bounce light back and actually reduce visibility. Driving close to the center of the lane to feel the road removes the safety cue that edge lines provide, and ignoring edge lines altogether increases the risk of leaving the lane. Following this edge-line guidance, along with slower speed and extra following distance, keeps you better aligned and safer in fog.