At dusk or on overcast days, you should:
- Drive using your four-way flashers.
- Drive using your parking lights.
- Not turn on any vehicle lights.
- Turn on your headlights. ✓
Answer: D. Turn on your headlights.
You should turn on your headlights at dusk or on overcast days.
Why this is the answer
The Texas handbook says you must use headlights beginning 30 minutes after sunset and ending 30 minutes before sunrise, and any time people or vehicles are not visible clearly for 1,000 feet. Dusk and overcast conditions reduce how clearly you can see, so the handbook points you to headlights rather than leaving them off. It also says to slow down at night and be able to stop within the distance lit by your headlights.
Why the other answers are wrong
- A. Drive using your four-way flashers. — Four-way flashers are not described in the handbook as a substitute for headlights when daylight fades or the sky is gray.
- B. Drive using your parking lights. — Parking lights are mentioned for parking on an unlighted highway at night, not as the lights to use while driving in low daylight.
- C. Not turn on any vehicle lights. — Driving with no lights ignores the handbook's requirement to use headlights when daylight is limited or visibility is poor.
Remember it
Think lights for low light: when the sky dims, switch on your headlights, not just parking lights.
Official handbook: Texas Driver Handbook (DL-7), Chapter 8: Speed and Speed Limits , p. 47