High beam headlights are most effective for speeds faster than:
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90 MPH.
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50 MPH.
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70 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
If a vehicle using high beams is coming toward you:If a vehicle is approaching with high beams, drivers should look __________ until the vehicle passes.Headlights must be turned on:By law, headlights must be turned on:What is NOT true regarding the use of headlights?Low beam headlamps are only effective for speeds up to ___ MPH.Bright lights must be dimmed _____ feet before passing a vehicle.You must dim your headlights within ______ of vehicle you are following.When driving in the rain, fog, or smoke in the daytime, what lights should drivers use?You must dim your headlights in which of the following situations?
This question appears in the following DMV practice tests: