A passenger train configuration where individual cars have their own diesel engines mounted underneath the floor, eliminating the need for a separate locomotive. The units are linked by control cables so a single engineer can operate the entire consist. They are highly efficient for low-density commuter lines and branch routes where full locomotive-hauled trains are too expensive to run.
The transit authority is testing a new diesel multiple unit on the branch line to cut down on fuel costs.
Also heard as
- DMU
Related terms
EMU
An electric multiple unit is a self-propelled passenger train powered by electricity.
Multiple unit
A train configuration where several self-propelled cars are coupled and controlled from a single cab.
Consist
The makeup of a train, listing its locomotives and cars in order with weights, loads and hazmat.