Which lights should be used if a driver is having trouble seeing other vehicles because of dust or smoke blowing across the roadway?
- Parking lights.
- Emergency lights.
- Headlights. ✓
Answer: C. Headlights.
Use your headlights when dust or smoke blowing across the road makes it hard to see other vehicles.
Why this is the answer
The California handbook says to turn on your headlights when conditions such as clouds, dust, smoke, or fog prevent you from seeing other vehicles. Headlights help you see ahead and help other drivers see you. The same section also says it is illegal to drive using only parking lights, so parking lights are not the right choice for this situation.
Why the other answers are wrong
- A. Parking lights. — Parking lights are not enough here, and the handbook says it is illegal to drive using only parking lights.
- B. Emergency lights. — Emergency lights are not the normal driving lights for dust or smoke; the handbook mentions emergency flashers when pulling off the road if fog becomes too thick.
Remember it
If dust or smoke hides traffic, turn on your headlights so you can see and be seen.