A self-propelled rail vehicle within a multiple-unit consist that contains both traction motors for propulsion and a driver's cab for controlling the train. Unlike unpowered cab cars or uncabbed motor cars, this unit provides both the muscle and the brain for the consist.
Heard on the job
We need to swap out the lead driving motor before the evening rush because it's throwing a traction fault.
Related terms
Multiple unit
A train configuration where several self-propelled cars are coupled and controlled from a single cab.
Control car
A non-powered passenger coach equipped with a driving cab to operate a train in reverse.
Traction motor
A heavy-duty electric motor geared directly to the axle of a locomotive or transit car.