To improve visibility lowered by rain or fog, drivers should use their:
- Low beam headlights. ✓
- High beam headlights.
- Parking lights.
Answer: A. Low beam headlights.
Use your low-beam headlights when rain or fog lowers visibility.
Why this is the answer
The California handbook says that if you need your windshield wipers because of fog, rain, or snow, you must turn on your low-beam headlights. For heavy fog, it again calls for low beams and explains that high beams reflect back and cause glare. It also says it is illegal to drive using only parking lights. So low beams are the setting that helps you see and be seen in poor weather without creating glare.
Why the other answers are wrong
- B. High beam headlights. — High-beam headlights are wrong here because in fog they reflect back and cause glare, making it harder to see.
- C. Parking lights. — Parking lights are wrong because the handbook says it is illegal to drive using only parking lights.
Remember it
Fog or rain on the glass means low beams, not high beams or parking lights alone.