Vehicles are non-living means of transportation. They are most often man-made (e.g. cars, motorcycles, trains, ships, and Aircraft), although some other means of transportation which are not made by man can also be called vehicles; examples include icebergs and floating tree trunks.
Vehicles may be propelled by animals, e.g. a Chariot or an ox-cart. However, animals on their own, though used as a means of transportation, are not called vehicles. This includes humans carrying another human, for example a child or a disabled person.
Most land vehicles have wheels. Please see the Wheel article for examples of vehicles with and without wheels.
Movement without the help of a vehicle or an animal is called Locomotion. The word vehicle itself comes from the Latin vehiculum.
AVL stands for Automatic vehicle location.