Railways with a track gauge of were first constructed as horse-drawn wagonways. The first intercity passenger railway to use 3 ft 6 in was constructed in Norway by Carl Abraham Pihl. From the mid-nineteenth century, the gauge became widespread in the British Empire. In Africa it became known as the Cape gauge as it was adopted as the standard gauge for the Cape Government Railways in 1873, although it had already been established in Australia and New Zealand before that. It was adopted as a standard in New Zealand, South Africa, Indonesia, Japan, the Philippines, Taiwan, and Queensland (which has the second largest narrow gauge network in the world) in Australia. There are approximately 112000 km of gauge track in the world, which are classified as narrow-gauge railways.

History

Nomenclature

This gauge is sometimes called Cape gauge, named after the Cape Colony in what is now South Africa, which adopted it in 1873. "Cape gauge" was used in several English-speaking countries. The equivalent of Cape gauge is used in other languages, such as the Dutch kaapspoor, German Kapspur, Norwegian kappspor and French voie cape. After metrication in the 1960s, the gauge was referred to in official South African Railways publications as instead of 1067 mm. In Sweden, the gauge was nicknamed Blekinge gauge, as most of the railways in the province of Blekinge had this gauge. Colonial Gauge was used in New Zealand. In Australia, this gauge is typically referred to as narrow gauge in comparison to standard gauge or broad gauge. In some instances, simply 3 foot 6 inch — or in rarer cases medium gauge — is used to distinguish it from other narrow gauges. In Japan the gauge, along with other narrow gauges, is referred to as kyōki (狭軌), which directly translates as narrow gauge, to differentiate it from the Shinkansen lines. It is defined in metric units. It is commonly referred to as 三六軌間 (36 gauge), which derives from the 3 ft 6 in.

Similar gauges

Similar, but incompatible without wheelset adjustment, rail gauges in respect of aspects such as cost of construction, practical minimum radius curves and the maximum physical dimensions of rolling stock are: Dual gauge between gauge and another similar gauge can make these bonus gauges.

Usage