Variable gauge

Variable gauge systems allow railway vehicles to travel between two railways with different track gauges. Vehicles are equipped with variable gauge axles (VGA). The gauge is altered by driving the train through a gauge changer installed at the break of gauge which moves the wheels to the gauge desired.

Variable gauge systems exist within the internal network of Spain, and are installed on international links between Spain/France (Spanish train), Sweden/Finland (Swedish train), Poland/Lithuania (Polish train) and Poland/Ukraine (Polish train).

A system for changing gauge without the need to stop is in widespread use for passenger traffic in Spain,[1] for services run on a mix of dedicated high-speed lines (using Standard gauge) and older lines (using Iberian gauge).[2] Similar systems for freight traffic are still in their infancy, as the higher axle weight increases the technological challenge. Although several alternatives exist, including transferring freight, replacing individual wheels and axles, bogie exchange, transporter flatcars or the simple transshipment of freight or passengers, they are impractical, thus a cheap and fast system for changing gauge would be beneficial for cross-border freight traffic.[3]

Alternative names include Gauge Adjustable Wheelsets (GAW), Automatic Track Gauge Changeover Systems (ATGCS/AGCS),[4] Rolling Stock Re-Gauging System (RSRS), Rail Gauge Adjustment System (RGAS), Shifting wheelset,[5] Variable Gauge Rolling Truck,[6] track gauge change and track change wheelset.

  1. ^ "New generation of gauge changeover Facilities: The UNICHANGER Project" (PDF). Retrieved 30 March 2017.
  2. ^ "Avant Serie 121". Retrieved 30 March 2017.
  3. ^ "Frictions On The New Silk Road – Analysis". 26 January 2017. Retrieved 30 March 2017.
  4. ^ Tieri, Roberto; Cavicchi, Paolo; Kinderis, Vytautas (2016). "Implementation of Automatic Gauge Changeover Systems: available technical solutions, cost effectiveness and standardisation. (AGCS)". railknowledgebank.com. UIC. Retrieved 19 September 2024. For this purpose a survey has been conducted of the various AGCS solutions available (chapters 2, 3 and 4), the potential market share (chapter 5) and the cost-effectiveness of the system (chapter 6).
  5. ^ Chudzikiewicz, Andrzej (2007). "Shifting Wheelset". Machine Dynamics Problems. 31 (2): 46–56.
  6. ^ "The Variable Gauge Rolling Truck". Archived from the original on March 10, 2007. Retrieved February 18, 2016.

Variable gauge

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