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Track geometry involves standards, speed limits and other regulations in the areas of track gauge, alignment, elevation, curvature and track surface. [2] [failed verification] Standards are usually separately expressed for horizontal and vertical layouts although track geometry is three-dimensional.
In rail transport, track gauge is the distance between the two rails of a railway track. All vehicles on a rail network must have wheelsets that are compatible with the track gauge. Since many different track gauges exist worldwide, gauge differences often present a barrier to wider operation on railway networks.
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 ...
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.
Ideally, the track should have sleepers (railroad ties) at a closer spacing and a greater depth of ballast to accommodate the increased forces exerted in the curve. At the ends of a curve, where the rails straighten out, the amount of cant cannot change from zero to its maximum immediately. It must change gradually in a track transition curve ...
See 3 + 1 ⁄ 2 in (89 mm) gauge ridable miniature railways. 121 mm 4 + 3 ⁄ 4 in: See 4 + 3 ⁄ 4 in (121 mm) gauge ridable miniature railways. 127 mm 5 in: See 5 in (127 mm) gauge ridable miniature railways. 145 mm 5 + 7 ⁄ 10 in and 5 + 45 ⁄ 64 in Denmark: Brandhøjbanen dk, at Hedeland veteran railway dk, Hedeland, Hedehusene, Høje ...
Track gauge is the defined width between two rails. definition not measurement Italian units Spanish, Portuguese, Swedish rounding scaling/miniature
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.