When driving in fog or mist, never put your headlights on the high beam setting because:
- The light will reflect back into your eyes. ✓
- Approaching vehicles might not see you.
- Vehicles behind you may follow too closely.
Answer: A. The light will reflect back into your eyes.
Never use high beams in fog or mist because the light reflects back into your eyes off the moisture in the air.
Why this is the answer
The manual explains that high beams reflect rain, fog and snow as it falls, and that this makes it even harder for you to see. The moisture in fog throws the bright light back toward you instead of lighting up the road ahead. For better visibility in these conditions, the manual says to keep your headlights on low beam, slow down, signal your turns earlier and brake early. So the reason high beams are wrong in fog is the glare coming back at you, not how other drivers perceive your car.
Why the other answers are wrong
- B. Approaching vehicles might not see you. — It is the opposite kind of problem: the manual says headlights, even in low-light periods, make it easier for other drivers and pedestrians to see your vehicle, so being seen is not the reason to avoid high beams.
- C. Vehicles behind you may follow too closely. — Whether a vehicle behind you follows too closely has nothing to do with your high beam setting; the manual's point about following vehicles is to reduce glare from their lights, not yours.
Remember it
Think of fog as a wall of tiny mirrors: bright light bounces straight back at you, so keep it low.