You should use your horn when:
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Pedestrians cross without looking.
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A vehicle is approaching in your lane in the opposite direction.
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The traffic signal turns green but the vehicle in front doesn't move.
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You get frustrated.
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Explanation
Avoid using your horn unless it’s absolutely necessary to prevent a collision. For instance, use your horn-and flash your headlights-if a vehicle is drifting into your lane and heading toward you. This alerts the other driver and may help prevent a crash.
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🟡 This question is moderately difficult — 22.7% of our users answer it incorrectly.
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This question appears in the following DMV practice tests: