Train (transport)
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This article is about the form of transport. For other uses of the term Train, please see Train (disambiguation).
A train comprises one or more vehicles connected together and running on a track, usually for passenger travel or freight transport. Trains typically run on two rails, but monorail services require only one, and maglev trains do away with track altogether. Early trains were steam locomotives, but today most trains are headed by diesel locomotives or are supplied with electricity from overhead wires or other rails.