A motor vehicle is a vehicle whose propulsion is provided by an engine or motor ("motor"). The internal combustion engine is the most common motor choice, although electric motors or other types are sometimes used. Motor vehicles or road vehicles typically run on public roads. The rules of the road are laws or practices which all road users must obey; many relate specifically to motor vehicles or subtypes of them. Some common types of motor vehicle:
an automobile (usually known as a car in Britain, from a legal term motorised carriage)
a truck (commonly called a lorry in Britain, - until about 1911 a railway term from load bearer)
