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When must you not sound your horn?

  1. Between the hours of 11:30 pm and 7am in built up areas

  2. During heavy traffic

  3. When approaching a blind curve

  4. All the time in residential areas

The correct answer is: Between the hours of 11:30 pm and 7am in built up areas

Between the hours of 1130 pm and 7 am in built up areas is the correct answer. This is because during these hours, people are likely to be sleeping and the sound of your horn could wake them up and disturb their rest. Option B is incorrect because even during heavy traffic, it may be necessary to use your horn to alert other drivers or avoid a potential accident. Option C is incorrect because in this situation, it may be necessary to use your horn to signal your presence and prevent a collision. Option D is incorrect because using your horn in residential areas should be done sparingly, but there may be certain situations where it is necessary for safety reasons.