Noun Concept
Categories: All articles containing potentially dated statements, 1863 introductions, Passenger rail transport, Rapid transit
rapid transit  mass rapid transit  underground train  El train  Elevated Light Rail
Rapid transit or mass rapid transit, also known as heavy rail, metro, subway, tube, or underground, is a type of high-capacity public transport generally found in urban areas. Wikipedia
High-capacity public transport generally used in urban areas Wikidata
A train for transportation of people, mostly beneath the surface of the ground, in order to lessen the traffic. OmegaWiki
A commuter rail system that combines aspects of an interurban railway with those of a subway, using a menagerie of pathways such as viaduct, tunnel, beam, cut and cover, trench, at grade, and others. Wiktionary
Commuter rail system. Wiktionary (translation)