This article does not cite any sources. Please help by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: – ···scholar·JSTOR(May 2019) (Learn how and when to remove this template message)
900 mm (2 ft 11+7⁄16 in)narrow-gauge railways are generally found in Europe. This gauge is mostly used for light urban rail networks, industrial and agricultural railways.
Used by the Germans up to 1945, called Feldbahn (field railway), for industrial plants or other temporary uses. In Norway during the WW II the Germans built a 15 km railway between the harbour at Årdalstangen and the industrial plant of . It closed in 1959, by then used only at the iron works. One steam locomotive was lost into the sea, but was found by divers around 1990 and is restored and exhibited at Aardalstangen.
Lisbon funiculars (from 1913) and tramways (from 1901) and their preceding mule cars (regauged in 1888–1894 from 1,435 mm or 4 ft 8+1⁄2 instandard gauge)
Braga tramways (1914–1963)
Linha do Porto à Póvoa e Famalicão and its branch lines (Leixões and São Gens), built in 1871–1893 and regauged to 1,000 mm (3 ft 3+3⁄8 in) metre gauge in 1930[citation needed]
In Sweden there has been an extensive network of railways with 891 mm (2 ft 11+3⁄32 in) gauge, Swedish three foot gauge railways. Some of them remain. This is so close to 900 mm (2 ft 11+7⁄16 in) that they are more or less compatible, and some sales of rolling stock between the gauges have taken place.