The Autotrain on the County Down Railway, Northern Ireland. The Autotrain was a type of passenger train used in the early 20th century, where the steam locomotive could be remotely controlled from the rear of the train. This meant that the engine would not have to run-around at the end of a journey before returning. These trains were also known as motor trains or railmotors at the time, but the term railmotor is now used to refer to trains where the steam engine was integrated into the coach. A driving cab in the rearmost coach has controls to allow the driver to operate the regulator, brake and whistle when driving the train 'in reverse'. The fireman would remain on the engine in order to stoke the fire. Autotrains were being used by most rail companies in Great Britain by the 1920s, and were particularly common on branch line services. They remained in widespread use until the 1950s and 1960s, when they were replaced by diesel multiple units (DMUs).