Using your horn is legal when it is necessary to warn others of danger or to avoid accidents. Warning a pedestrian or cyclist who didn’t see your vehicleAlerting another driver who may be drifting into your laneSignaling your presence at blind corners or intersectionsIt is illegal or discouraged to use the horn:As a way to express angerContinuously in quiet zones (e.g., near hospitals or schools)Just to rush other driversImproper use of the horn can result in fines and is considered discourteous driving behavior.