From Wikipedia, the free encyclopedia

The term tube railway may refer to:

  • an atmospheric railway, a railway that uses differential air pressure to provide power for propulsion of a vehicle
  • an underground railway constructed in a circular tunnel by the use of a tunnelling shield
  • by extension of the previous definition, the London Underground, most (but not all) of whose lines are so constructed
From Wikipedia, the free encyclopedia

The term tube railway may refer to:

  • an atmospheric railway, a railway that uses differential air pressure to provide power for propulsion of a vehicle
  • an underground railway constructed in a circular tunnel by the use of a tunnelling shield
  • by extension of the previous definition, the London Underground, most (but not all) of whose lines are so constructed

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