What are 3 types of rail gauge?

Generally, the types of railway track gauges can be divided into the standard gauge, the narrow gauge, and the broad gauge. The most common gauge is standard gauge 1435mm (4 feet 8 1/2 inches). Gauges narrower than 1435mm are called narrow gauge while wider than 1435mm are called broad gauge.



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If locomotives were imported from elsewhere, especially in the early days, the track would be built to fit them. In some cases standard gauge was adopted, but many countries or companies chose a different gauge as their national gauge, either by governmental policy, or as a matter of individual choice.

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It mandated the track gauge with a width of 1435 mm to be the standard for Great Britain. At that time, the UK was the only one capable of exporting railway rolling stock. As a result, the vast majority of railways in Europe adopted the 1435mm gauge.

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In fact, it is known as the “Iberian gauge”. This can be traced back to 1844, when a group of technicians stated that, due to the Spanish and Portuguese orography, the width of the inner sides of the tracks had to be increased.

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In 1970, the Soviet Union began a smooth change of the track gauge from 1,524 mm to 1,5200 mm. This process lasted over 20 years, until the early 1990s. Various official sources indicate that the aim for the change was to increase the stability of the railways when operating freight trains, increasing their speed.

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Broad gauge of 1,676 mm (5 ft 6 in), commonly known as Indian gauge, is the dominant track gauge in India, Pakistan, Bangladesh, Sri Lanka, Argentina, Chile, and on BART (Bay Area Rapid Transit) in the San Francisco Bay Area. This is the widest gauge in common use anywhere in the world.

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Since the chariots were made for or by Imperial Rome they were all alike in the matter of wheel spacing. Thus, we have the answer to the original question. The United States standard railroad gauge of 4 feet, 8.5 inches derives from the original specification for an Imperial Roman army war chariot.

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Clearly, it is safe to assume that Japan's choice of the 3'6 narrow gauge was based more on the cheaper construction cost than on the demands of topography. Norway gradually replaced its narrow gauge track with standard gauge but Japan did not take this road because of economic and military considerations.

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Russian gauge is 1520 mm and Standard gauge is 1435 mm, so there's a difference of 85 mm. Now as to the rail vehicles themselves, it is a matter of what the loading gauge is, i.e., what are the dimensions of the largest rollingstock that can operate. This can vary even on railways that use the same track gauge.

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