When are you not allowed to sound your vehicle’s horn?

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Use of your vehicle’s horn

Rule 112 of the UK highway code states:

The horn. Use only while your vehicle is moving and you need to warn other road users of your presence. Never sound your horn aggressively. You MUST NOT use your horn

  • while stationary on the road
  • when driving in a built-up area between the hours of 11.30 pm and 7.00 am

except when another road user poses a danger.