High beam headlights are most effective for speeds faster than:
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70 MPH.
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90 MPH.
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25 MPH.
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50 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
You should dim your lights for oncoming vehicles or when you are within 300 feet of a vehicle:Drivers should use high beam headlights when:If you are blinded by the headlights of an approaching vehicle, you should:Bright lights must be dimmed _____ feet before passing a vehicle.Bright lights must be dimmed _____ feet before meeting an oncoming vehicle.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:Headlights must be turned on from sunset to sunrise.When it starts raining enough to turn on your windshield wipers, you should:Which of the following is true?Your headlights must be on low beam within ______ of a vehicle ahead of you.
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