High beam headlights are most effective for speeds faster than:
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90 MPH.
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70 MPH.
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50 MPH.
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25 MPH.
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Explanation
High beam headlights can illuminate up to 450 feet of the road ahead and are most effective at speeds over 25 MPH. Low beams are best for speeds up to 20–25 MPH, and drivers should avoid 'overdriving' these lights (driving too fast for what they can see).
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Other questions in the same category: Proper Use of Windshield Wipers and Headlights
Bright lights must be dimmed _____ feet before passing a vehicle.As you drive, you must turn your headlights on:On rainy, snowy or foggy days, you should turn on your windshield wipers and:When it starts raining enough to turn on your windshield wipers, you should:Which of the following is true?Pennsylvania law requires you use low beams whenever you are within ____ feet of an oncoming vehicle and when you are following a vehicle within ____ feet.If an approaching driver refuses to switch their high beams to low, you should:Headlights must be turned on from sunset to sunrise. If you are using your high beams, you must dim your lights when an oncoming vehicle is within:The law requires you to turn on your headlights when operating your windshield wipers.High beam headlights can reveal objects up to a distance of ____ feet.
This question appears in the following DMV practice tests: