Règles de la route

The correct use of your horn is to:

Afficher la réponse et l'explication
Bonne réponse : B. Warn other drivers of your presence to prevent a collision

The horn is a safety tool. Using it for anger, greetings, or routine signalling dilutes its safety value — other drivers stop paying attention to a horn if it is used routinely. Short tap to warn; hold only for imminent danger.