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. It is considered the standard for high-speed and heavy-haul railway lines. It is also commonly used for urban tramways.
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👉 Ballastless track in the context of Yellow line (Stockholm Metro)
The Yellow Line (Swedish: Gula linjen) is a line under construction on the Stockholm Metro, that will connect Fridhemsplan in the west of central Stockholm to Älvsjö in the southern part of the city. The line is planned to open for service in 2034, and should serve approximately 75,000 passengers per day by 2050.
The Yellow Line will use a traffic control system with driverless operation, platform screen doors, and ballastless track, making it the first metro line in Stockholm to incorporate these features. The line will feature interchanges with all three of the Metro's existing lines, as well as to the Stockholm commuter rail and Tvärbanan light rail, however will be the Metro's first line without a station at T-Centralen.
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Ballastless track in the context of Railway track
Railway track (CwthE and UIC terminology) or railroad track (NAmE), also known as permanent way (per way) (CwthE) or "P way" (BrE 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. It enables trains to move by providing a dependable, low-friction surface on which steel wheels can roll. Early tracks were constructed with wooden or cast-iron rails, and wooden or stone sleepers. Since the 1870s, rails have almost universally been made from steel.