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In railway engineering, "gauge" is the transverse distance between the inner surfaces of the heads of two rails, which for the vast majority of railway lines is the number of rails in place. However, it is sometimes necessary for track to carry railway vehicles with wheels matched to two different gauges. Such track is described as dual gauge – achieved either by addition of a third rail, if it will fit, or by two additional rails. Dual-gauge tracks are more expensive to configure with signals and sidings, and to maintain, than two separate single-gauge tracks. It is therefore usual to build dual-gauge or other multi-gauge tracks only when necessitated by lack of space or when tracks of two different gauges meet in marshalling yards or passenger stations. Dual-gauge tracks are by far the most common configuration, but triple-gauge tracks have been built in some situations.
gauges. Such track is described as dualgauge – achieved either by addition of a third rail, if it will fit, or by two additional rails. Dual-gauge tracks...
narrow-gauge equipment. Solutions to interchangeability problems include bogie exchanges, a rollbock system, dualgauge, variable gauge, or gauge conversion...
Russian gauge (1,520 mm) and broad gauge 1,524 mm. These gauges cannot make 3-rail dualgauge with Russian gauge. 1,676 mm (5 ft 6 in) Indian gauge 1,668 mm...
transporter wagons, dualgauge, and even containerization or variable gauge axles), but they were not implemented at the height of the Gauge War in the 1840s...
track change wheelset. Variable gauge axles help solve the problem of a break-of-gauge without having to resort to dualgauge tracks or transshipment. Systems...
and Somerton, is also dualgauge gauntlet track. On the Western standard gauge line from Melbourne towards Adelaide, dualgauge track can be found between...
stretch of dual-gauge track terminates at Grodno Lithuania – 3 kV DC/25 kV AC, as part of the construction of Rail Baltica a new standard-gauge diesel line...
to Manual gauge changing. Wikimedia Commons has media related to Automated gauge changing. List of gauge conversions Break-of-gaugeDualgauge Wheel centres...
青函トンネル, Seikan Tonneru or 青函隧道, Seikan Zuidō) is a 53.85 km (33.46 mi) dual-gauge railway tunnel in Japan, with a 23.3 km (14.5 mi) portion under the seabed...
currently[when?] converting its railway system to dualgauge system, to enable both broad gauge and metre gauge trains to run; it is also developing extensive...
mixed gauge network: the majority is broad gauge (a legacy of the Russian standard) with rapidly expanding lines using the standard gauge or dualgauge track...
standard gauge of 1,435 mm (4 ft 8+1⁄2 in). Some countries use broad gauge, of which there are three types. Narrow gauges are also in use. Russian gauge 1,520 mm...
and Akita, one of the two narrow gauge lines was regauged, and a section of the remaining narrow gauge line is dualgauge, providing the opportunity for...
lines converted to standard gauge, some having been first dualgauged with a third running rail allowing standard gauge trains to share the track, prior...
Track gauge in the United States is standard gauge. In 1867 the Great Western Railway converted to dualgauge the 229 miles (369 km) line from Windsor to...
In physics, a gauge theory is a type of field theory in which the Lagrangian, and hence the dynamics of the system itself, do not change under local transformations...
7+1⁄4 in (184 mm) gauge being by far the most numerous. Many layouts have dual-gauge track combing two, three or even more different gauges. Ridable miniature...
track gauges by size. A gauge is measured between the inner faces of the rails. For ridable miniature railways and minimum gauge railways, the gauges are...
generally standard gauge. However, conspicuous by their absence, is the possibility of dualgauge, containerisation, variable gauge axles, bogie exchange...
Ukraine - Halmeu, Romania: dualgauge crossing, not electrified; currently freight only. Dualgauge line enables standard gauge connections from Halmeu with...