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  2. Track geometry - Wikipedia

    en.wikipedia.org/wiki/Track_geometry

    Track gauge or rail gauge (also known as track gage in North America [8]) is the distance between the inner sides (gauge sides) of the heads of the two load bearing rails that make up a single railway line. Each country uses different gauges for different types of trains.

  3. Track geometry car - Wikipedia

    en.wikipedia.org/wiki/Track_geometry_car

    A track geometry car (also known as a track recording car) is an automated track inspection vehicle on a rail transport system used to test several parameters of the track geometry without obstructing normal railroad operations. Some of the parameters generally measured include position, curvature, alignment of the track, smoothness, and the ...

  4. Hallade method - Wikipedia

    en.wikipedia.org/wiki/Hallade_method

    The Hallade method, devised by Frenchman Emile Hallade, is a method used in track geometry for surveying, designing and setting out curves in railway track. [1] It involves measuring the offset of a string line from the outside of a curve at the central point of a chord. In reality, string is too thick to provide a clear reading and breaks ...

  5. Track transition curve - Wikipedia

    en.wikipedia.org/wiki/Track_transition_curve

    The Euler spiral provides the shortest transition subject to a given limit on the rate of change of the track superelevation (i.e. the twist of the track). However, as has been recognized for a long time, it has undesirable dynamic characteristics due to the large (conceptually infinite) roll acceleration and rate of change of centripetal ...

  6. Category:Track geometry - Wikipedia

    en.wikipedia.org/wiki/Category:Track_geometry

    Track geometry is three-dimensional geometry of track layouts and associated measurements used in design, construction and maintenance of railroad tracks. The subject is used in the context of standard, speed limits and other regulations in the areas of track gauge , alignment, elevation, curvature and track surface.

  7. 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.

  8. Cant deficiency - Wikipedia

    en.wikipedia.org/wiki/Cant_deficiency

    On a mixed traffic route owned by a freight rail company, freight considerations are likely to prevail. On a mixed traffic route owned by a passenger rail company some kind of compromise may be needed. Cant deficiency is generally looked at with respect to ideal track geometry. As geometry of real track is never perfect it may be desirable to ...

  9. History of the railway track - Wikipedia

    en.wikipedia.org/wiki/History_of_the_railway_track

    The railway track or permanent way is the elements of railway lines: generally the pairs of rails typically laid on the sleepers or ties embedded in ballast, intended to carry the ordinary trains of a railway. It is described as a permanent way because, in the earlier days of railway construction, contractors often laid a temporary track to ...