What is Escalator?
[[File:Copenhagen Metro escalators.jpg|Escalators in a [[Copenhagen Metro]] station, Denmark, 2007.|thumb|280px]] An '''escalator''' is a moving staircase – a [[conveyor transport]] device for carrying people between floors of a building. The device consists of a [[Electric motor|motor]]-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal. {{transport-stub}} [[Category:Transport]] [[Category:Construction]] [[Category:Infrastructure]]