A broad-gauge railway is a railway with a track gauge (the distance between the rails) broader than the 1,435 mm (4 ft 8+1⁄2 in) used by standard-gauge railways. Broad gauge of 1,520 mm (4 ft 11+27⁄32 in), more known as Russian gauge, is the dominant track gauge in former Soviet Union countries (CIS states, Baltic states, Georgia, Ukraine) and Mongolia.
A broad-gauge railway is a railway with a track gauge (the distance between the rails) broader than the 1,435 mm (4 ft 8+1⁄2 in) used by standard-gauge railways. Broad gauge of 1,520 mm (4 ft 11+27⁄32 in), more known as Russian gauge, is the dominant track gauge in former Soviet Union countries (CIS states, Baltic states, Georgia, Ukraine) and Mongolia.
Source: Wikipedia "Broad-gauge railway" · CC BY-SA 4.0
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