When does Texas require you to turn on your headlights during a normal day-to-night transition?
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A.
Only when road lighting fails or another vehicle approaches.
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B.
At sunset every evening, until sunrise the next morning.
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C.
Beginning 30 minutes after sunset and ending 30 minutes before sunrise. Correct
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D.
Fifteen minutes before sunset until fifteen minutes after sunrise.
The answer is "Beginning 30 minutes after sunset and ending 30 minutes before sunrise."
Texas sets a fixed daily headlight window: 30 minutes after sunset until 30 minutes before sunrise. Option B comes from the driving habit of flipping the switch at sunset itself, which skips the 30-minute buffer the manual actually sets.
The traps in the wrong answers
A. Only when road lighting fails or another vehicle approaches.
Headlights are also required during the fixed after-sunset window, not just when visibility drops. This answer treats headlights as a pure visibility tool, missing the clock-based trigger the law layers on top of the visibility one.
B. At sunset every evening, until sunrise the next morning.
The trigger sits 30 minutes past sunset and 30 minutes before sunrise, not at the sunset moment itself. This answer follows the habit of flipping the switch as the sun visibly drops, which lands a full half-hour early on the manual's window.
D. Fifteen minutes before sunset until fifteen minutes after sunrise.
The manual's buffer is 30 minutes: after sunset and before sunrise, not before sunset and after sunrise. This answer borrows the shorter figure some drivers carry from early-education mnemonics that keyed headlights to dusk visibility rather than a clock rule.
This question tests your knowledge of Adverse Conditions in Texas. Source: Texas Driver Manual, "Chapter 9: Some Special Driving Situations - Headlights," p.47..
Related Texas questions
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