A car or automobile is a motor vehicle with wheels. Most definitions of cars say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people, not cargo.There are costs and benefits to car use. The costs to the individual include acquiring the vehicle, interest payments , repairs and maintenance, fuel, depreciation, driving time, parking fees, taxes, and insurance.The costs to society include maintaining roads, land use, road congestion, air pollution, noise pollution, public health, and disposing of the vehicle at the end of its life. Traffic collisions are the largest cause of injury-related deaths worldwide