standard gauge

• standard gage (USA)

standard gauge (uncountable)

1. (rail transport) A track gauge of 56.5 inches (1435 mm).
   • 1964, Norton S. Ginsburg, “CH’ANG-CH’UN”, in Encyclopedia Britannica‎, volume 5, →OCLC, page 267, column 2:

     The city began as a local trading centre for north Chinese settlers at the end of the 18th century. It expanded rapidly and from 1905 to 1935 was a major junction and transshipment point between the Russian-owned broad-gauge Chinese Eastern railway and the Japanese-owned standard-gague South Manchurian railway. Ch’ang-ch’un was equipped with sizable railroad shops and also became the junction for railways extending westward into Inner Mongolia and eastward into northern Korea.

• narrow gauge
• broad gauge
• metre gauge