Traffic safetyQuestion #14767
When may you use the horn in a built-up area?
Explanation
To keep noise down and avoid needlessly disturbing other road users, sounding the horn in built-up areas is tightly restricted. You may only use it when there is a real danger and it is the only way to prevent an accident.
KET reference: KET 88: in built-up areas the horn may not be used except where it is necessary to prevent an accident.