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Not to be confused with Railroad car
A railcar is a self-propelled rail vehicle designed to transport passengers. The term 'Railcar' is
usually used in reference to a train consisting of a single coach (carriage, car), with a
drivers cab at each end.
The term is sometimes also used as an alternatve name for a multiple
unit which consist of more than one coach.
Railcars are usually propelled by a diesel engine mounted underneath
the floor of the coach.
Sometimes when there are enough passengers to justify it, railcars can be joined together to form multiple units.
Railcars are economic to run because of their small size, and in many countries are often used to run passenger services on
minor railway lines, such as rural railway lines where passenger traffic is sparse,
and where the use of a longer train would not be cost effective.
A variation of railcar is a railbus, a very lightweight type of railcar designed for use specifically on
little-used railway lines, and as the name suggests share many aspects of their construction with a bus, usually having a bus, or modified bus body, and having four wheels on a fixed base, instead of on bogies.
Railbuses were used commonly in countries such as Germany, and a type of railbus
known as a pacer is still commonly used in the United Kingdom.
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