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32-525: The Bo-Bo-Bo configuration is often used to lower axle weight while keeping lateral forces low compared to a locomotive with two three-axle bogies, thus allowing the locomotive to use lightly laid track, in particular narrow-gauge railways . The arrangement is extensively used on Italian and Japanese railways. Other examples include New Zealand 's DJ , EW and EF classes; the Eurotunnel Class 9 locomotives, which were themselves derived from

64-698: A 3 ft 6 in ( 1,067 mm ) gauge, whereas Vietnam, Malaysia and Thailand have metre-gauge railways . Narrow-gauge trams, particularly metre-gauge, are common in Europe. Non-industrial, narrow-gauge mountain railways are (or were) common in the Rocky Mountains of the United States and the Pacific Cordillera of Canada, Mexico, Switzerland, Bulgaria, the former Yugoslavia , Greece, and Costa Rica. A narrow-gauge railway

96-593: A Bo+Bo+Bo arrangement) or else significant side play on the center bogie. The Italian locomotives and New Zealand EW class are articulated, whereas the Eurotunnel and New Zealand EF and DJ class locomotives' central bogies have a lot of sideplay. A similar arrangement, but without separate traction motors for each axle, would be a B′B′B′ arrangement as UIC, indistinguishably B-B-B in AAR. This arrangement has been used for electric locos with three monomotor bogies , such as

128-425: A curve with standard-gauge rail ( 1435 mm ) can allow speed up to 145 km/h (90 mph), the same curve with narrow-gauge rail ( 1067mm ) can only allow speed up to 130 km/h (81 mph). In Japan and Queensland, recent permanent-way improvements have allowed trains on 3 ft 6 in ( 1,067 mm ) gauge tracks to exceed 160 km/h (99 mph). Queensland Rail 's Electric Tilt Train ,

160-408: A definition of "physical clearance" between roadway surface and the underside of bridge element. The code also defines the clearance that is shorter than the physical clearance to account for sag curves , bridge deflection and expected settlements with a recommendation of minimum clearance of 5 metres (16 ft 5 in). In UK, the "standard minimum clearance" for structures over public highways

192-455: A design speed of 137 km/h (85 mph). Curve radius is also important for high speeds: narrow-gauge railways allow sharper curves, but these limit a vehicle's safe speed. Many narrow gauges, from 15 in ( 381 mm ) gauge to 4 ft 8 in ( 1,422 mm ) gauge, are in present or former use. They fall into several broad categories: 4 ft 6 in ( 1,372 mm ) track gauge (also known as Scotch gauge)

224-474: A heavy-duty narrow-gauge line is Brazil's EFVM . 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ) gauge, it has over-100-pound rail (100 lb/yd or 49.6 kg/m) and a loading gauge almost as large as US non-excess-height lines. The line has a number of 4,000-horsepower (3,000 kW) locomotives and 200-plus-car trains. Narrow gauge's reduced stability means that its trains cannot run at speeds as high as on broader gauges. For example, if

256-503: A mine in Bohemia with a railway of about 2 ft ( 610 mm ) gauge. During the 16th century, railways were primarily restricted to hand-pushed, narrow-gauge lines in mines throughout Europe. In the 17th century, mine railways were extended to provide transportation above ground. These lines were industrial , connecting mines with nearby transportation points (usually canals or other waterways). These railways were usually built to

288-825: A number of large 3 ft ( 914 mm ) railroad systems in North America; notable examples include the Denver & Rio Grande and Rio Grande Southern in Colorado; the Texas and St. Louis Railway in Texas, Arkansas and Missouri; and, the South Pacific Coast , White Pass and Yukon Route and West Side Lumber Co of California. 3 ft was also a common track gauge in South America, Ireland and on

320-592: A range of industrial railways running on 500 mm ( 19 + 3 ⁄ 4  in ) and 400 mm ( 15 + 3 ⁄ 4  in ) tracks, most commonly in restricted environments such as underground mine railways, parks and farms, in France. Several 18 in ( 457 mm ) gauge railways were built in Britain to serve ammunition depots and other military facilities, particularly during World War I . Structure gauge A structure gauge , also called

352-427: A restricted clearance at very slow speed. The term can also be applied to the minimum size of road tunnels , the space beneath overpasses and the space within the superstructure of bridges , as well as doors into automobile repair shops , bus garages , filling stations , residential garages , multi-storey car parks , overhangs at drive-throughs and warehouses . Eurocode 1: Actions on structures has

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384-491: Is a track gauge of 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ). It has about 95,000 km (59,000 mi) of track. According to Italian law, track gauges in Italy were defined from the centre of each rail rather than the inside edges of the rails. This gauge, measured 950 mm ( 3 ft  1 + 3 ⁄ 8  in ) between the edges of the rails, is known as Italian metre gauge . There were

416-488: Is one where the distance between the inside edges of the rails is less than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Historically, the term was sometimes used to refer to what are now standard-gauge railways , to distinguish them from broad-gauge railways , but this use no longer applies. The earliest recorded railway appears in Georgius Agricola 's 1556 De re metallica , which shows

448-416: Is the loading gauge : a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. The difference between these two gauges is called the clearance . The specified amount of clearance makes allowance for wobbling of rail vehicles at speed or the shifting of vehicles on curves; consequently, in some circumstances a train may be permitted to go past

480-1021: The Isle of Man . 900 mm was a common gauge in Europe. Swedish three-foot-gauge railways ( 891 mm or 2 ft  11 + 3 ⁄ 32  in ) are unique to that country and were once common all over the country. Today the only 891 mm line that remains apart from heritage railways is Roslagsbanan , a commuter line that connects Stockholm to its northeastern suburbs. A few railways and tramways were built to 2 ft 9 in ( 838 mm ) gauge, including Nankai Main Line (later converted to 3 ft 6 in or 1,067 mm ), Ocean Pier Railway at Atlantic City , Seaton Tramway ( converted from 2 ft ) and Waiorongomai Tramway . 800 mm ( 2 ft  7 + 1 ⁄ 2  in ) gauge railways are commonly used for rack railways . Imperial 2 ft 6 in ( 762 mm ) gauge railways were generally constructed in

512-588: The minimum structure outline , is a diagram or physical structure that sets limits to the extent that bridges, tunnels and other infrastructure can encroach on rail vehicles. It specifies the height and width of station platforms, tunnels and bridges , and the width of the doors that allow access to a warehouse from a rail siding . Specifications may include the minimum distance from rail vehicles to railway platforms , buildings, lineside electrical equipment cabinets, signalling equipment, third rails or supports for overhead lines . A related but separate gauge

544-587: The 500mm gauge tracks of their mine railway ; these locomotives were made by the Deutz Gas Engine Company ( Gasmotorenfabrik Deutz ), now Deutz AG . Another early use of internal combustion was to power a narrow-gauge locomotive was in 1902. F. C. Blake built a 7 hp petrol locomotive for the Richmond Main Sewerage Board sewage plant at Mortlake . This 2 ft 9 in ( 838 mm ) gauge locomotive

576-556: The Italian FS Class E.632 of 1982. These are a pair of Bo′Bo′Bo′ locomotives semi-permanently coupled as a single unit. They are each constructed with a single cab, giving a cab at each end. This layout includes Russian freight electric locomotives VL15 , VL85 , VL86f and the experimental gas turbine electric locomotive GT1h -001, which was converted from an electric locomotive VL15. Narrow gauge railway A narrow-gauge railway ( narrow-gauge railroad in

608-709: The New Zealand EF class; the Swiss SBB Re 6/6 (Re 620); the Russia Railways VL65 , EP1 (EP1M), EP10 and EP20 ; and the South Korean Korail Class 8000 . China imported 6K electric locomotive from Japan between 1986 and 1987. The Bo-Bo-Bo design was applied to SS7 series except SS7E. Locomotives of this type are also used on Myanmar railways . The State Rail Authority of New South Wales , Australia built

640-952: The Philippines demonstrate that if track is built to a heavy-duty standard, performance almost as good as a standard-gauge line is possible. Two-hundred-car trains operate on the Sishen–Saldanha railway line in South Africa, and high-speed Tilt Trains run in Queensland. In South Africa and New Zealand, the loading gauge is similar to the restricted British loading gauge; in New Zealand, some British Rail Mark 2 carriages have been rebuilt with new bogies for use by Tranz Scenic (Wellington-Palmerston North service), Tranz Metro (Wellington-Masterton service), and Auckland One Rail (Auckland suburban services). Another example of

672-847: The US) is a railway with a track gauge narrower than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) standard gauge . Most narrow-gauge railways are between 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) and 1,067 mm ( 3 ft 6 in ). Since narrow-gauge railways are usually built with tighter curves , smaller structure gauges , and lighter rails ; they can be less costly to build, equip, and operate than standard- or broad-gauge railways (particularly in mountainous or difficult terrain). Lower-cost narrow-gauge railways are often used in mountainous terrain, where engineering savings can be substantial. Lower-cost narrow-gauge railways are often built to serve industries as well as sparsely populated communities where

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704-920: The coal industry. Some sugar cane lines in Cuba were 2 ft  3 + 1 ⁄ 2  in ( 699 mm ). 2 ft ( 610 mm ) gauge railways were generally constructed in the former British colonies. The U.S. had a number of railways of that gauge , including several in the state of Maine such as the Wiscasset, Waterville and Farmington Railway . 1 ft  11 + 3 ⁄ 4  in ( 603 mm ), 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) and 1 ft  11 + 1 ⁄ 2  in ( 597 mm ) were used in Europe. Gauges below 1 ft  11 + 1 ⁄ 2  in ( 597 mm ) were rare. Arthur Percival Heywood developed 15 in ( 381 mm ) gauge estate railways in Britain and Decauville produced

736-544: The fastest train in Australia and the fastest 3 ft 6 in ( 1,067 mm ) gauge train in the world, set a record of 210 km/h (130 mph). The speed record for 3 ft 6 in ( 1,067 mm ) narrow-gauge rail is 245 km/h (152 mph), set in South Africa in 1978. A special 2 ft ( 610 mm ) gauge railcar was built for the Otavi Mining and Railway Company with

768-575: The former British colonies . 760 mm Bosnian gauge and 750 mm railways are predominantly found in Russia and Eastern Europe. Gauges such as 2 ft 3 in ( 686 mm ), 2 ft 4 in ( 711 mm ) and 2 ft  4 + 1 ⁄ 2  in ( 724 mm ) were used in parts of the UK, particularly for railways in Wales and the borders, with some industrial use in

800-522: The last of its 86 Class electric locomotives (8650) in the Bo-Bo-Bo arrangement (called locally a Tri-Bo), but this did not prove successful and it spent long periods out of traffic undergoing repair. The first Italian six-axle electric locomotives, such as the E.626 , used a Bo′BoBo′ layout, where the two centre axles were mounted on a rigid frame and only the outer pairs on bogies. This wheel arrangement requires either an articulated frame (becoming

832-550: The same narrow gauge as the mine railways from which they developed. The world's first steam locomotive , built in 1802 by Richard Trevithick for the Coalbrookdale Company, ran on a 3 ft ( 914 mm ) plateway . The first commercially successful steam locomotive was Matthew Murray 's Salamanca built in 1812 for the 4 ft 1 in ( 1,245 mm ) Middleton Railway in Leeds . Salamanca

864-475: The traffic potential would not justify the cost of a standard- or broad-gauge line. Narrow-gauge railways have specialised use in mines and other environments where a small structure gauge necessitates a small loading gauge . In some countries, narrow gauge is the standard: Japan, Indonesia, Taiwan, New Zealand, South Africa, and the Australian states of Queensland , Western Australia and Tasmania have

896-565: The world; 19th-century mountain logging operations often used narrow-gauge railways to transport logs from mill to market. Significant sugarcane railways still operate in Cuba, Fiji, Java, the Philippines, and Queensland, and narrow-gauge railway equipment remains in common use for building tunnels. In 1897, a manganese mine in the Lahn valley in Germany was using two benzine -fueled locomotives with single cylinder internal combustion engines on

928-525: Was adopted by early 19th-century railways, primarily in the Lanarkshire area of Scotland. 4 ft  6 + 1 ⁄ 2  in ( 1,384 mm ) lines were also constructed, and both were eventually converted to standard gauge. 1,067 mm ( 3 ft 6 in ) between the inside of the rail heads, its name and classification vary worldwide and it has about 112,000 kilometres (70,000 mi) of track. As its name implies, metre gauge

960-563: Was also the first rack-and-pinion locomotive. During the 1820s and 1830s, a number of industrial narrow-gauge railways in the United Kingdom used steam locomotives. In 1842, the first narrow-gauge steam locomotive outside the UK was built for the 1,100 mm ( 3 ft  7 + 5 ⁄ 16  in )-gauge Antwerp-Ghent Railway in Belgium. The first use of steam locomotives on a public, passenger-carrying narrow-gauge railway

992-560: Was in 1865, when the Ffestiniog Railway introduced passenger service after receiving its first locomotives two years earlier. Many narrow-gauge railways were part of industrial enterprises and served primarily as industrial railways , rather than general carriers. Common uses for these industrial narrow-gauge railways included mining, logging, construction, tunnelling, quarrying, and conveying agricultural products. Extensive narrow-gauge networks were constructed in many parts of

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1024-592: Was probably the third petrol-engined locomotive built. Extensive narrow-gauge rail systems served the front-line trenches of both sides in World War I . They were a short-lived military application, and after the war the surplus equipment created a small boom in European narrow-gauge railway building. The heavy-duty 3 ft 6 in ( 1,067 mm ) narrow-gauge railways in Australia (Queensland), New Zealand, South Africa, Japan, Taiwan, Indonesia and

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