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  2. Track gauge - Wikipedia

    en.wikipedia.org/wiki/Track_gauge

    The most common use of the term "track gauge" refers to the transverse distance between the inside surfaces of the two load-bearing rails of a railway track, usually measured at 12.7 millimetres (0.50 inches) to 15.9 millimetres (0.63 inches) below the top of the rail head in order to clear worn corners and allow for rail heads having sloping ...

  3. Standard-gauge railway - Wikipedia

    en.wikipedia.org/wiki/Standard-gauge_railway

    A standard-gauge railway is a railway with a track gauge of 1,435 mm ... (the measurement adopted from 1844) ... Light rail system uses standard gauge.)

  4. Track gauge in the United States - Wikipedia

    en.wikipedia.org/wiki/Track_gauge_in_the_United...

    The Portland Company was formed to build locomotives of this gauge for use on the local rail system. [3] 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 ...

  5. List of track gauges - Wikipedia

    en.wikipedia.org/wiki/List_of_track_gauges

    Original definition of Brunel's broad gauge. This rail gauge was soon changed to 7 ft 1 ⁄ 4 in (2,140 mm) [105] to ease running in curves. 2,140 mm 7 ft 1 ⁄ 4 in: South Africa East London and Table Bay harbour railways England Brunel's Great Western Railway until converted to standard gauge by May 1892, See Great Western Railway The "gauge ...

  6. Track gauge in North America - Wikipedia

    en.wikipedia.org/wiki/Track_gauge_in_North_America

    The vast majority of North American railroads are standard gauge (4 ft 8 + 1 ⁄ 2 in / 1,435 mm).Exceptions include some streetcar, subway and rapid transit systems, mining and tunneling operations, and some narrow-gauge lines particularly in the west, e.g. the isolated White Pass and Yukon Route system, and the former Newfoundland Railway.

  7. Track geometry - Wikipedia

    en.wikipedia.org/wiki/Track_geometry

    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.

  8. Track spacing - Wikipedia

    en.wikipedia.org/wiki/Track_spacing

    Measurement of track spacing from the rail head to rail head. By definition, the track spacing is given from centre to centre of a rail track. For an actual construction the distance is measured from the inside of a rail head to the matching one of the other track. As far as both tracks have the same gauge this is the same distance.

  9. Railway track - Wikipedia

    en.wikipedia.org/wiki/Railway_track

    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).