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Dual gauge
Videos
A dual gauge railroad track has three or four rails, allowing vehicles of two track gauges to run on it.
Baseplate on dual-gauge track showing the minimum practicable gap between the bases of two rails – about 40 mm (11/2 in) – which determines the minimu
Baseplate on dual-gauge track showing the minimum practicable gap between the bases of two rails – about 40 mm (11/2 in) – which determines the minimum difference in gauges possible in a three-rail configuration
Triple-gauge for metre (1000 mm), standard (1435 mm), and Russian (1524 mm) gauges at Škoda's facility in Plzeň, Czechia. Numbering rails 1 to 5 from
Triple-gauge for metre (1000 mm), standard (1435 mm), and Russian (1524 mm) gauges at Škoda's facility in Plzeň, Czechia. Numbering rails 1 to 5 from left to right at the top of the image and A to D at the bottom, the metre-gauge track uses rails 2/3 and B/C, the standard-gauge track uses rails 1/4 and B/D, and the Russian-gauge track uses rails 2/5 and A/C. This changeover allows to change which common rails are used by which gauges, transitioning from 4 rails to 5 rails. The metre-gauge track is configured for tram wheelsets, as can be seen by the smaller gap between rail 3 and its check rail.
Dual gauge tracks at Belo Horizonte, Brazil
Dual gauge tracks at Belo Horizonte, Brazil
Wallaroo dual gauge railway 0855
Wallaroo dual gauge railway 0855
Break of gauge
Videos
With railways, a break of gauge occurs where a line of one track gauge meets a line of a different gauge. Trains and rolling stock generally cannot run through without some form of conversion between
A cartoon depicting the "horrors of goods transfer" at the break of gauge at Gloucester in 1843
A cartoon depicting the "horrors of goods transfer" at the break of gauge at Gloucester in 1843
Bogie-exchange station in Ukraine
Bogie-exchange station in Ukraine
Variable gauge axles on a Spanish train designed for intercity travel to France
Variable gauge axles on a Spanish train designed for intercity travel to France
A train on 1435 mm standard-gauge track leaving Russia. It is bound for Manzhouli, China, having replaced its 1520 mm-gauge bogies with standard-gauge
A train on 1435 mm standard-gauge track leaving Russia. It is bound for Manzhouli, China, having replaced its 1520 mm-gauge bogies with standard-gauge bogies at the bogie exchange yard in the distance.