A train driver, engine driver, engineman or locomotive driver, commonly known as an engineer in the United States and Canada, and also as a locomotive handler, locomotive operator, train operator, or motorman, is a person who drives a train or a locomotive. The driver is in charge of, and responsible for the mechanical operation of the train, train speed, and all train handling. In American English, a hostler moves engines around train yards, but does not take them out on the normal tracks; the British English equivalent is a shunter.