::Dual gauge

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Track gauge

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Minimum   Fifteen inch 381 mm (15 in) Narrow   Two foot, 600 mm 597 mm 600 mm 603 mm 610 mm (1 ft 11 1⁄2 in) (1 ft 11 5⁄8 in) (1 ft 11 3⁄4 in) (2 ft)   750 mm, Bosnian, Two foot six inch, 800 mm 750 mm 760 mm 762 mm 800 mm (2 ft 5 1⁄2 in) (2 ft 5 15⁄16 in) (2 ft 6 in) (2 ft 7 1⁄2 in)   Swedish three foot, 900 mm, Three foot 891 mm 900 mm 914 mm (2 ft11 3⁄32 in) (2 ft 11 7⁄16) (3 ft)   Metre 1,000 mm (3 ft 3 3⁄8 in)   Three foot six inch, Cape, CAP, Kyōki 1,067 mm (3 ft 6 in)   Four foot six inch 1,372 mm (4 ft 6 in)   Standard 1,435 mm (4 ft 8 1⁄2 in) Broad   Russian, Five foot 1,520 mm 1,524 mm (4 ft 11 27⁄32 in) (5 ft)   Irish 1,600 mm (5 ft 3 in)   Iberian 1,668 mm (5 ft 5 21⁄32 in)   Indian 1,676 mm (5 ft 6 in)   Six foot 1,829 mm (6 ft)   Brunel 2,140 mm (7 ft 1⁄4 in)
Change of gauge
Break-of-gaugeDual gauge Conversion (list)Bogie exchangeVariable gauge
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A dual-gauge railway is a line of track that provides for trains of two separate gauges. A mixed-gauge railway provides for more than two separate gauges, but is also a term sometimes used to denote dual-gauge. A dual-gauge track configuration usually consists of three rails, two 'vital' (or gauge-) rails, one for each gauge, plus a 'common rail'--although at times, commonality is not possible and four rails are required (the two separate tracks of each gauge are placed within each other). In an ordinary three-rail dual-gauge configuration, the two adjacent outer rails give provide each of the gauges, while the single outer rail is common to trains of both gauges operating over it. This configuration is not to be confused with the electric current traction rail (third rail) or a check or guard rail.

Dual gauge sections
Intro   Reasoning    Configuration    Gauge conversion    Examples    Four rail dual gauge    Double dual gauge    Triple gauge    Quadruple Gauge    Accidents on dual-gauge railways    Complexity of dual-gauge switches    Opposition    Operation and detection    Separate gauge    Platforms    Overlapping gauges    Other methods of handling multiple gauges    Dual gauge dual voltage    Model railways / miniature ridable railways   See also    Notes    External links   

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