Diesel multiple unit

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A diesel multiple unit (DMU) is a type of train where the traction is supplied by driving bogies under one or more carriages of the (usually very short) train. The driver's cab is usually truncated to a short room at both ends. The quicker turnaround time that results, and the reduced size compared with large locomotive-hauled trains, has made the DMU a major part of suburban commuter rail services.

A DMU-like vehicle powered by electricity is known as an electrical multiple unit.

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