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Railways with atrack gauge of5 ft 3 in (1,600 mm) fall within the category ofbroad-gauge railways. As of 2022[update], they were extant inAustralia,Brazil and on theisland of Ireland.
| Country/region | Railway |
|---|---|
| Australia | Main articles:Rail transport in South Australia andRail transport in Victoria Currently, the suburban rail networks inAdelaide,Melbourne, and most regional lines inVictoria (including some that cross the border intoNew South Wales) use5 ft 3 in (1,600 mm). The 828 km (514.5 mi) longMelbourne–Adelaide rail corridor linking South Australia and Victoria, and some associated branch lines, wasconverted tostandard gauge in 1995. The final 200 km (124.3 mi) section of theNorth East line, Victoria and the 125 km (77.7 mi) longOaklands railway line, which runs intoNew South Wales from Victoria, were converted to standard gauge in 2008–2010. TheMildura andMurrayville railway lines were converted to standard gauge in 2018. |
| Brazil | Main article:Rail transport in Brazil Lines connecting the states ofRio de Janeiro,São Paulo andMinas Gerais; E.F.Carajás inPará andMaranhão states, and Ferronorte inMato Grosso andMato Grosso do Sul states. Used in older Metro systems. Although the metre-gauge network is almost five times longer,[14] Irish gauge is considered the standard byABNT.[15] The current[when?] network is 4,057 km or 2,521 mi, 15% of the total Brazilian network. |
| Germany | Grand Duchy of Baden State Railway 1840–1855[16] |
| Island of Ireland | Main article:Rail transport in Ireland Following proposed projects of theUlster Railway andDublin and Drogheda Railway companies (using6 ft 2 in (1,880 mm) and5 ft 2 in (1,575 mm), respectively), and existing issues of competing gauges in Great Britain, in 1843 theBoard of Trade (with the advice of engineersCharles Pasley andGeorge Stephenson) introduced the gauge as a compromise.[2] TheRailway Regulation (Gauge) Act 1846 was passed to formalise the gauge used on the island of Ireland to 5 feet 3 inches (1600mm).[3][2] As of 2013[update] the network totals over 2,730 km or 1,696 mi, 2,400 km or 1,491 mi in theRepublic of Ireland[17] and 330 km or 205 mi inNorthern Ireland. |
| New Zealand | Canterbury Railways from 1863; all were routes converted to3 ft 6 in (1,067 mm) by 1876. |
| Switzerland | Swiss Northern Railway between 1847 and 1854, converted to1,435 mm (4 ft 8+1⁄2 in)standard gauge. Fun'Ambule Funicular in Neuchâtel, 330 m long, opened 27 April 2001. |
| United States | Altoona and Logan Valley Electric Railway[18][19] |
ThePennsylvania trolley gauges of5 ft 2+1⁄2 in (1,588 mm) and5 ft 2+1⁄4 in (1,581 mm) are similar to this gauge, but incompatible. There is also a5 ft 2 in (1,575 mm) gauge. See:Track gauge in Ireland.

Before the advent of diesel and electric traction, one of the advantages of the broader5 ft 3 in (1,600 mm) Irish gauge compared to4 ft 8+1⁄2 in (1,435 mm) was that more space between steam locomotiveframes allows for a bigger firebox, enabling generation of more steam.