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The large network of narrow-gauge sugar cane light railways, almost all 610 mm (2 ft) gauge, is not shown, Rail gauge in Australia. Rail gauge world Track gauge Rail gauge world Map Rail gauge world Map, 600mm. to 1676 mm. Rail gauge world Map, 597 mm. to 2140 mm. Triple-gauge track on turntable, Gladstone, South Australia.
In rail transport, track gauge is the distance between the two rails of a railway track. All vehicles on a rail network must have wheelsets that are compatible with the track gauge. Since many different track gauges exist worldwide, gauge differences often present a barrier to wider operation on railway networks.
It contains some 250 track gauge definitions (widths), often by different units (defined metric and/or imperial). Entry data structure A single entry is a subtable (by {...} ) in the data page.
The vast majority of rapid transit systems use 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge.Some of the largest and oldest subway systems in the world use standard gauge in agreement with the country wide dominant usage for track gauge, e.g. London Underground (1863), Chicago "L" (1892), Vienna Metro (1898), Paris Métro (1900), Berlin U-Bahn (1902), New York City Subway (1904), Stockholm ...
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For standard gauge railways, double stacking maximum height shall be 6.15 m (20 ft 2 in). For Indian gauge railways, double stacking maximum height shall be 7.1 m (23 ft 4 in), and minimum overhead wiring height shall be 6.5 or 6.75 m (21 ft 4 in or 22 ft 2 in) above rails.
Russian and 5 ft gauge. 1,520 mm (4 ft 11 + 27 ⁄ 32 in): former Soviet Union states; 1,524 mm (5 ft): Finland and Estonia (The difference is within tolerance limits, so it is possible to exchange trains between 1520 mm and 1524 mm networks without changes to the wheelsets, however sometimes issues like stuck rolling stock might occur.)
The gauge was known as "Texas gauge" while required by Texas law until 1875, [4] and used by the New Orleans, Opelousas and Great Western Railroad (NOO&GW) until 1872, and by the Texas and New Orleans Railroad until 1876. The New England railways were similarly standard-gauged in the 1870s.