Cape Horn | All-terrain vehicle | Unmanned aerial vehicle | horn | Trevor Horn | Remotely operated underwater vehicle | Sport utility vehicle | electric vehicle | unmanned aerial vehicle | Horn-Bad Meinberg | Van Horn, Texas | Hybrid electric vehicle | Armoured fighting vehicle | Recreational vehicle | launch vehicle | Landing Vehicle Tracked | Keith Van Horn | Horn | Gyula Horn | Big Horn Mountains | Walther Hermann Richard Horn | Vehicle Assembly Building | motor vehicle | Horn Island | Dara Horn | all-terrain vehicle | Vehicle registration | Vehicle armour | Street-legal vehicle | Polar Satellite Launch Vehicle |
Air horns are widely employed as vehicle horns, installed on large semi-trailer trucks, fire trucks, trains, and some ambulances as a warning device, and on ships as a signalling device.