Railways with a track gauge of 3 ft 6 in / 1,067 mm 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 3 ft 6 in gauge became widespread in the British Empire. It was known as the Cape gauge as it was adopted as the standard gauge for the Cape Government Railways. 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 112,000 kilometres (70,000 mi) of 1,067 mm gauge track in the world, which are classified as narrow gauge railways.
- One of the first railways to use 3 ft 6 in (1,067 mm) gauge was the Little Eaton Gangway in England, constructed as a horse-drawn wagonway in 1795. Other 3 ft 6 in gauge wagonways in England and Wales were also built in the early nineteenth century.
- The Silkstone Waggonway was opened, connecting the Barnsley Canal to collieries including the Huskar Pit
- The Severn and Wye Railway introduces a steam locomotive on its 3 ft 6 in gauge plateway.
- The Norwegian engineer Carl Abraham Pihl constructed the first 3 ft 6 in gauge railway in Norway, the Røros Line.
- The Queensland Railways were constructed. Its 3 ft 6 in gauge was promoted by the Irish engineer Abraham Fitzgibbon and consulting engineer Charles Fox.
- The construction of the railroad from the Castillo de Buitrón mine to the pier of San Juan del Puerto, Huelva, Spain, began. The width was 3 ft 6 in (1,067 mm).
- In 1868 Charles Fox asks civil engineer Edmund Wragge to survey a 3 ft 6 in railway in Costa Rica.
- The Cape gauge was adopted by New Zealand to expedite the development of transport under Julius Vogel's Great Public Works Policy; see The Vogel Era.
- The Canadian Toronto, Grey and Bruce Railway and the Toronto and Nipissing Railway were opened, promoted by Pihl and Fitzgibbon and surveyed by Wragge as an engineer of Fox. The Canadian province of Prince Edward Island began building its 3 foot 6 network.
- In January Robert Fairlie advocated the use of 3 ft 6 in gauge in his book Railways Or No Railways: Narrow Gauge, Economy with Efficiency v. Broad Gauge, Costliness with Extravagance.
- The first 3 ft 6 in gauge railway opened in Japan. It had been proposed by the British civil engineer Edmund Morel based on his experience building railways in New Zealand.
- On 1 January, the first 3 ft 6 in gauge railway was opened in New Zealand, constructed by the British firm John Brogden and Sons. Earlier built 4 ft 8+1⁄2 in (1,435 mm) and broad gauge railways were soon converted to the narrower gauge.
- The Cape Colony adopted the 3 ft 6 in gauge. After conducting several studies in southern Europe, the Molteno Government selected the gauge as being the most economically suited for traversing steep mountain ranges. Beginning in 1873, under supervision of Railway engineer of the Colony William Brounger, the Cape Government Railways rapidly expanded and the gauge became the standard for southern Africa.
- Natal also converted its short 10 kilometres (6.2 miles) long Durban network from 4 ft 8+1⁄2 in (1,435 mm) standard gauge prior to commencing with construction of a network across the entire colony in 1876. Other new railways in Southern Africa, notably Mozambique, Bechuanaland, the Rhodesias, Nyasaland and Angola, were also constructed in 3 ft 6 in gauge during that time.
- After 1876
- In the late nineteenth and early twentieth century numerous 3 ft 6 in gauge tram systems were built in the United Kingdom and the Netherlands. Newfoundland began its Cape gauge network in 1881.
The most common name for this gauge is 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 1,065 mm (3 ft 5+15⁄16 in) instead of 1067 mm.
In Australia the imperial (pre-metric) term 3 foot 6 inch is used. In some Australian publications the term medium gauge is also used, while in Australian states where 4 ft 8+1⁄2 in (1,435 mm) or 5 ft 3 in (1,600 mm) is the norm, 1,067 mm (3 ft 6 in) gauge is often referred to as narrow gauge.
In Japan the 1,067 mm (3 ft 6 in) 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, 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:
- 1,100 mm (3 ft 7+5⁄16 in),
- 1,093 mm (3 ft 7 in),
- 1,055 mm (3 ft 5+1⁄2 in),
- 1,050 mm (3 ft 5+11⁄32 in), and
- 1,000 mm (3 ft 3+3⁄8 in) metre gauge.
Dual gauge between 1,067 mm (3 ft 6 in) gauge and another similar gauge can make these bonus gauges.
|Angola||Rail transport in Angola, some converted from 2 ft (610 mm) gauge and 1,000 mm (3 ft 3+3⁄8 in) metre gauge. Some isolated.|
|Australia||New South Wales: the heritage Zig Zag Railway line. Queensland: 8,146 km (5,062 mi). South Australia: the isolated (and now mostly closed) Eyre Peninsula Railway network, and the heritage Pichi Richi Railway. Victoria: the heritage Bellarine Railway line. Tasmania: 611 km (380 mi). Western Australia: 2,970 km (1,850 mi). Northern Territory (closed).11,930 km (7,410 mi).|
|Botswana||The Botswana Railways system consists of 888 kilometres (552 mi) of 3 ft 6 in (1,067 mm) gauge track.|
|Canada||Western New Brunswick until gauge conversion in the 1880s; the Newfoundland Railway until abandonment in September 1988, and the Prince Edward Island Railway until gauge conversion in 1930 following a car ferry connection with the main North America system, until abandonment in December 1989; see Narrow gauge railways in Canada.|
|China||South Manchuria Railway — built to 1,524 mm (5 ft) as part of the Chinese Eastern Railway, converted by advancing Japanese troops during the Russo-Japanese War of 1904–1905 to Japanese 1,067 mm (3 ft 6 in) gauge, converted to standard gauge after the war by the new South Manchuria Railway Company.|
|Congo, Democratic Republic of||3621 km 3 ft 6 in (1,067 mm) gauge (858 km or 533 mi electrified). Some converted from 1,000 mm (3 ft 3+3⁄8 in) and 2 ft 6 in (762 mm) gauge.|
|Congo, Republic of||The Congo–Ocean Railway, 502 kilometres (312 mi) long (operating).|
|Costa Rica||Operation of the national railway network was suspended in 1995 after an earthquake. As of 2013, some suburban lines are operational.|
|Dominican Republic||Samaná to Santiago Railway, (later Ferrocarriles Unidos Dominicanos) 139 km (86 mi), in operation from 1887 to 1976 (defunct)|
|Ecuador||Empresa de Ferrocarriles Ecuatorianos 965 km (600 mi)|
|Estonia||Tallinn tram of 38 km (24 mi), on all lines from the beginning in 1888, only on some lines in 1915–1931, and again on all lines from 1931.|
|Ghana||The national rail network of 935 km (581 mi) is undergoing major rehabilitation.|
|Haiti||Saint-Marc line (defunct)|
|Hong Kong||Hong Kong Tramways|
|Indonesia||5,961 km (3,704 mi). Most common gauge for main lines of Sumatra and Java. The first railway was actually built to standard gauge (the Semarang–Solo–Yogyakarta corridor), but later lines were built to cape-gauge size owing to economic feasibility. The remainder of standard gauge lines were regauged by Japanese army during World War II to 3 ft 6 in (1,067 mm) gauge, with parts using standard gauge sleepers. The gauge is also used by Jakarta MRT and Palembang LRT.|
|Isle of Man||Snaefell Mountain Railway|
|Japan||22,301 km (13,857 mi). First track gauge introduced. All JR Group lines and some private railways use this gauge except for high-speed shinkansen lines which use standard gauge.|
|Jersey||Jersey Railway (defunct). Partly converted from 4 ft 8+1⁄2 in (1,435 mm) standard gauge|
|Malawi||Malawi Railways has 797 km (495 mi) of 3 ft 6 in (1,067 mm) gauge railways.|
|Mozambique||Mozambique Ports and Railways operates 2,983 km (1,854 mi) of 3 ft 6 in (1,067 mm) gauge.|
|Namibia||TransNamib operates 2,883 km (1,791 mi) of 3 ft 6 in (1,067 mm) gauge, partly converted from 600 mm (1 ft 11+5⁄8 in) gauge.|
|Netherlands||Some tramway systems (all defunct)|
|New Zealand||3,900 km (2,400 mi), standardized by the Public Works Act 1870|
|Nicaragua||373 km (232 mi) of track until closure of the national rail network in 1993. All lifted and scrapped.|
|Nigeria||Nigerian Railway Corporation operates an isolated network of 3,505 kilometers (2,178 mi) 3 ft 6 in (1,067 mm) gauge single track lines.|
|Norway||The gauge was first used by C A Pihl on the Hamar-Grundset Line, opened 23 June 1862. Most lines were 3 ft 6 in (1,067 mm) gauge lines built in the 19th century were rebuilt to standard gauge between 1904 and 1949. The Setesdal Line, a heritage railway line of about eight km remains 3 ft 6 in (1,067 mm) gauge.|
|Panama||Panama Tramways Company (1913–1917) and the Panama Electric Company (1917–1941).|
|Philippines||The Philippine National Railways operates a 72 km (45 mi) Metro Manila–Laguna segment of its old 1,140 km (710 mi) network; Panay Railways had 154 km (96 mi) in Panay and Cebu. PNR will re-gauge its entire network to 1,435 mm (4 ft 8+1⁄2 in) standard gauge.|
|Sierra Leone||There are 84 kilometres of 3 ft 6 in (1,067 mm) gauge private railways in Sierra Leone.|
|South Africa||About 20,500 route-km. Gautrain (80 km) is 4 ft 8+1⁄2 in (1,435 mm) standard gauge and there were several limited 2 ft (610 mm) narrow gauge systems.|
|South Sudan||Isolated, 248 kilometers (154 mi)|
|Spain||The line from Cartagena to Los Blancos was originally 1,067 mm (3 ft 6 in), but was converted to 1,000 mm (3 ft 3+3⁄8 in) in 1976, at the same time as the line was extended to Los Nietos.|
|Sudan||Isolated, 4,725 kilometers (2,936 mi)|
|Swaziland||301 kilometres (187 mi), only for transportation of goods, not passengers|
|Sweden||Several during the 19th century, all closed or regauged.|
|Taiwan||1,097 km (682 mi) (Taiwan Railways Administration)|
|Tanzania||Dar es Salaam to Zambia (TAZARA Railway only, rest of the network is 1,000 mm (3 ft 3+3⁄8 in) metre gauge.|
|Turkey||Chemin de Fer Moudania Brousse|
|Venezuela||Great Venezuela Railway|
|Zambia||Railway Systems of Zambia, Mulobezi Railway|
|Zimbabwe||National Railways of Zimbabwe|
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