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The rubber-tyred metro systems that incorporate 1,435 mm (4 ft 8+1⁄2 in) standard gauge track have angle ironsasguide bars, or guiding bars,[1] outside of the two roll ways. The Busan Subway Line 4, that lacks a rail track, has I-beams installed as guide bars. The flanges are vertical. The Sapporo Municipal Subway, that lacks a rail track as well, has no guide bars. It has a central guide rail instead. Guide bars are also used to provide guidance for guided buses.
Rail infrastructure
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Tracks (history) |
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Trackwork |
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Signalling and safety |
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Structures |
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Types |
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