Before changing lanes on a multi-lane highway, drivers should:
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Turn on their headlights.
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Reduce their speed.
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Check their mirrors and blind spots.
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Sound their horn.
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Explanation
Before changing lanes on a multi-lane highway, look in your rearview and side mirrors and quickly check your blind spots to make sure there are no vehicles in the lane you want to enter, and that no vehicle is about to pass you. Signal early enough so other drivers will know your plans in advance.
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🟡 This question is moderately difficult — 27.5% of our users answer it incorrectly.
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This question appears in the following DMV practice tests: