Editing Cross-platform interchange (section)

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{{Short description|Transfer station design}}
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{{stack|float=right|[[File:InterchangeStation.svg|thumb|right|upright=1.2|Diagram of a paired cross-platform interchange]]}}
A '''cross-platform interchange''' is a type of [[Interchange station|interchange]] between different lines at a metro (or other railway) station. The term originates with the [[London Underground]];<ref>{{cite web|url=https://www.google.com/search?q=%22cross-platform+interchange%22#q=%22cross-platform+interchange%22&hl=en&tbs=nws:1,ar:1,sbd:1&ei=CmiBTf2VL5LksQOq6KCDAg&start=10&sa=N&bav=on.2,or.r_gc.r_pw.&fp=a9fd55dcd046744b|title=Google News|access-date=16 March 2011}}</ref> such layouts exist in other networks but are not commonly so named. In the United States and Canada<!-- insert relevant RMTransit video here -->, it is often referred to as a '''cross-platform transfer'''.

This configuration occurs at a station with [[island platform]]s, with a single platform in between the tracks allocated to two directions of travel, or two [[side platform]]s between the tracks, connected by level corridors. The benefit of this design is that passengers do not need to use stairs to another platform level for transfer. A cross-platform interchange arrangement may be costly to build due to the complexity of rail alignment, especially if the railway designers also arrange the track with [[overpass|flyovers]] (which is typically done to increase efficiency).

A typical bidirectional cross-platform interchange configuration consists of two outbound directions of two different lines sharing an island platform, and the respective return directions of both lines sharing a different island platform in the same station complex. Less common is a cross-platform interchange to transfer onto a continuation of same single line served by that station, for example in [[Kirkby railway station|Kirkby]], [[Ormskirk railway station|Ormskirk]], and [[Pittsburg/Bay Point station|Pittsburg/Bay Point]].

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