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The Dublin & Drogheda Railway underwent a gauge conversion because the gauges were too close to allow a dual-gauge line. Italy. The Potenza – Avigliano Lucania line in Italy is a dual gauge rail with 1435 mm (4 ft 8 + 1 ⁄ 2 in) and 950 mm (3 ft 1 + 3 ⁄ 8 in) tracks. Japan. In Japan, the national standard is 1067 mm (3 ft 6 in) narrow gauge.
Track gauge conversion is the changing of one railway track gauge (the distance between the running rails) to another. In general, requirements depend on whether the conversion is from a wider gauge to a narrower gauge or vice versa, on how the rail vehicles can be modified to accommodate a track gauge conversion, and on whether the gauge conversion is manual or automated.
The Inland Railway line from Melbourne to Brisbne of 1600km length includes about 300km of dual gauge that improves the curves and gradients of the original Brisbane to Toowoomba line. This dual gauge replaces the narrow gauge that was chosen to enable cheap 100m radius curves and 2% gradients. 900 mm (2 ft 11 + 7 ⁄ 16 in) 1,000 mm (3 ft 3 ...
Haifa, Carmelit subway railway line - Funicular: England North Cliff Lift, Scarborough: 2,000 mm 6 ft 6 + 3 ⁄ 4 in: Scotland Cairngorm Mountain Railway - Funicular: 2,134 mm 7 ft: England Original definition of Brunel's broad gauge. This rail gauge was soon changed to 7 ft 1 ⁄ 4 in (2,140 mm) [104] to ease running in curves. 2,140 mm 7 ft 1 ...
If the difference between the two gauges is large enough – for example between 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge and 3 ft 6 in (1,067 mm) – three-rail dual-gauge is possible, but if not – for example between 3 ft 6 in (1,067 mm) and 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge – four rails must be used. Dual-gauge rail lines ...
The horizontal alignment (or alinement in the United States) is done by using a predefined length of string line (such as 62-foot in the US and 20 meters in Australia [5]) to measure along the gauge side of the reference rail. It is the distance (in inches or millimeters) from the midpoint of the string line to the gauge of the reference rail.
Last part of Edmonton Radial Railway (1908-1951) (same gauge) Nelson Electric Tramway: 1.2 km 1,435 mm (4 ft 8 + 1 ⁄ 2 in) 600 V Heritage streetcar: Ottawa Confederation Line: 12.5 km 1,435 mm (4 ft 8 + 1 ⁄ 2 in) 1500 V Ottawa Electric Railway (1891-1959) with the same gauge Toronto streetcar system: 83 km 4 ft 10 + 7 ⁄ 8 in (1,495 mm) 600 V
Measuring rail gauge. During the early days of rail, there was considerable variation in the gauge used by different systems, and in the UK during the railway building boom of the 1840s Brunel's broad gauge of 7 ft 1 ⁄ 4 in (2,140 mm) was in competition with what was referred to at the time as the 'narrow' gauge of 1,435 mm (4 ft 8 + 1 ⁄ 2 in).