As a general rule, is the use of acoustic signals (horn) permitted within built-up areas?
En español: Como norma general, ¿está permitido usar señales acústicas (claxon) dentro de poblado?
Why this is the correct answer
Within built-up areas, as a general rule, the use of the horn is prohibited. It is only allowed to avoid an imminent accident or by emergency services, since the noise harms quality of life and safety.