When you drive in heavy fog during daylight hours you should drive with your:
- Headlights off
- Parking lights on
- Headlights on low beam ✓
- Headlights on high beam
Answer: C. Headlights on low beam
Drive with your headlights on low beam.
Why this is the answer
The manual says that in fog you need your headlights on, and it warns that high beams bounce light back off fog, rain, or snow and make it harder to see. For better visibility in these conditions, it tells you to keep the headlights on low beam. It also says parking lights and daytime running lights are not a substitute for headlights. So low beam is the setting that lets you see as well as possible while still being visible.
Why the other answers are wrong
- A. Headlights off — Driving with headlights off is wrong because fog cuts visibility, and the manual requires headlights when weather makes wipers necessary to clear fog.
- B. Parking lights on — Parking lights are wrong because the manual says not to use them as a replacement for headlights.
- D. Headlights on high beam — High beams are wrong because in fog they reflect light back and make it harder for you to see.
Remember it
In fog, keep the light low so the fog does not throw it back at you.