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A multiple-unit train (or multiple unit (MU)) is a self-propelled train composed of one or more carriages joined, which if coupled to another multiple unit can be controlled by a single driver,[1] with multiple-unit train control.
Although multiple units consist of several carriages, single self-propelled carriages – also called railcars, rail motor coaches or railbuses – are in fact multiple units when two or more of them are working connected through multiple-unit train control (regardless of whether passengers can walk between the units or not).
- ^ "Rulebook Master: Glossary of Railway Terminology, Train Working "Coupled in multiple - Traction units coupled to allow through controls by one driver"" (PDF). Rail Safety and Standards Board. Archived from the original (PDF) on 10 August 2018. Retrieved 28 September 2017.