Mini-Shinkansen (Japanese: ミニ新幹線) is the name given to the concept of converting existing 1,067 mm (3 ft 6 in) narrow gauge railway lines to 1,435 mm (4 ft 8+1⁄2 in) standard gauge to allow operation of Shinkansen services in Japan. While the track gauge is widened, the original loading gauge is retained, requiring the use of specially designed Shinkansen rolling stock with a narrower cross-section, leading to the "mini-Shinkansen" designation.
Mini-Shinkansen (Japanese: ミニ新幹線) is the name given to the concept of converting existing 1,067 mm (3 ft 6 in) narrow gauge railway lines to 1,435 mm (4 ft 8+1⁄2 in) standard gauge to allow operation of Shinkansen services in Japan. While the track gauge is widened, the original loading gauge is retained, requiring the use of specially designed Shinkansen rolling stock with a narrower cross-section, leading to the "mini-Shinkansen" designation.
Source: Wikipedia "Mini-Shinkansen" · CC BY-SA 4.0
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