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e.g. Including the height of double stacked containers in well cars. The cross section at the bottom of the well car differs from the X section of all other AAR plates. X section at center of car [31] [35] [34] Width of 10 feet 8 inches (3.25 m) only possible at the trucks [31] 10 1 3.07 [31] 20 3 6.17: 63 9 19.43
Cross-section of 4-rail dual-gauge track (standard and metre gauge/ narrow gauge) (click to enlarge) Cross-section of Australian dual-gauge track – 1600 mm (5 ft 3 in) and 1435 mm (4 ft 8 + 1 ⁄ 2 in) gauges (click to enlarge) Mixed gauge track at Sassari, Sardinia: 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge and 950 mm (3 ft 1 + 3 ⁄ 8 in)
The Pennsylvania Railroad originally used 4 ft 9 in (1,448 mm) The trams in Dresden, authorised in 1872 as horsecars, used 1,440 mm (4 ft 8 + 11 ⁄ 16 in) gauge vehicles. Converted to 600 V DC electric trams in 1893, they now use 1,450 mm (4 ft 9 + 3 ⁄ 32 in); both gauges are within the tolerance for standard gauge.
When American railroad tracks extended to the point that they began to interconnect, it became clear that a single nationwide gauge would be beneficial. Where different gauges meet, there is a "break of gauge". To overcome that problem, special compromise cars were able to run 4 ft 10 in (1,473 mm) and standard gauge track. [18]
A worldwide garden railroad scale. Corresponds to NEM III and NMRA 3 ⁄ 4 inch. -1:12: 4 + 3 ⁄ 4 in (121 mm) North America specific scale corresponding to NMRA 1-inch scale. 1:12 is one of the most popular backyard railway scales. -1:11: 5 in (127 mm) Used outside North America. Corresponds to NEM V. One of the most popular garden railway ...
All modern freight tracks in Western Europe are built to this size, the modern replacement for the PPI minimum international loading gauge. By comparison, the central European "GC" loading gauge allows the use traditional flatcars with a deck height of 1,100 to 1,300 mm (3 ft 7 in to 4 ft 3 in) to carry intermodal shipping containers.
The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads.Essentially a simplification of the European UIC classification, it is widely used in North America to describe diesel and electric locomotives (including third-rail electric locomotives).
The Panama Railroad was originally 5 ft (1,524 mm) as in much of the Southern United States. This gauge was converted to 1,435 mm ( 4 ft 8 + 1 ⁄ 2 in ) when the line was rebuilt in 2000. Nowadays only the ship handling trains along the Panama Canal , called mules , still have the 150 cm / 5 ft track.