4 ft 6 in gauge railway

The 4 ft 6 in (1,372 mm) track gauge, also called the Scotch gauge, was adopted by early 19th century railways mainly in the Lanarkshire area of Scotland. It differed from the gauge of 4 ft 8 in (1,422 mm) that was used on some early lines in England. Early railways chose their own gauge, but later in the century interchange of equipment was facilitated by establishing a uniform rail gauge across railways: a so-called 'standard gauge' of 4 ft 8 ¹⁄₂ in (1,435 mm). In the early 1840s standard gauge lines began to be constructed in Scotland, and all the Scotch Gauge lines were eventually converted to standard gauge. The gauge was outlawed in Great Britain by law in 1846. From 1903, tram lines of Tokyo adopted this gauge.

Scottish railways built to Scotch gauge

A small number of early to mid-19th century passenger railways were built to Scotch gauge inclusing: