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A railway track (CwthE and UIC terminology) or railroad track (NAmE), also known as permanent way (CwthE) [1] or "P Way" BrE [2] and Indian English), is the structure on a railway or railroad consisting of the rails, fasteners, sleepers (railroad ties in American English) and ballast (or slab track), plus the underlying subgrade.
Layers in the construction of a mortarless pavement: A.) Subgrade B.) Subbase C.) Base course D.) Paver base E.) Pavers F.) Fine-grained sand Section through railway track and foundation showing the sub-grade. In transport engineering, subgrade is the native material underneath a constructed road, [1] pavement or railway track (US: railroad
Section through railway track and foundation showing the sub-grade. Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, [1] for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage.
It is designed primarily to reduce the stress on the subgrade. Other definitions include the surface of the ballast on which the track is laid, [1] the area left after a track has been dismantled and the ballast removed [1] or the track formation beneath the ballast and above the natural ground. [2]
Between Aue and Schwarzenberg, the line was rebuilt as a single-track line on the two-track subgrade in order to widen the narrow curves. As the enlargement of the Schlema tunnel to meet modern clearances would have been very expensive, the track on this section was also singled. Original plans called for a single track between Zwickau and Schlema.
Slab track with flexible noise-reducing rail fixings, built by German company Max Bögl, on the Nürnberg–Ingolstadt high-speed line. A ballastless track or slab track is a type of railway track infrastructure in which the traditional elastic combination of sleepers and ballast is replaced by a rigid construction of concrete or asphalt.
A track crew in Louisiana adjusting a railroad track using lining bars, in 1939. The most fundamental maintenance of way task is the construction, repair, and replacement of the track and its supporting ballast and grade. In the early days of railroading, this task was almost entirely completed by manual labor.
Railways with a track gauge between 500 mm (19 + 3 ⁄ 4 in) and 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge. Diamond crossing dual gauge double line narrow-gauge and standard-gauge. Narrow gauge track.