5 ft 3 in gauge railways
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- 600 BCE
- The Diolkos (Δίολκος) across the Isthmus of Corinth in Greece – a grooved paved trackway – was constructed with an average gauge of 5 ft 3 in (1,600 mm).
- The Grand Duchy of Baden State Railway was constructed to 5 ft 3 in gauge, converted to 4 ft 8 1⁄2 in (1,435 mm) standard gauge in 1854-1855.
- The Board of Trade of the United Kingdom recommended the use of 5 ft 3 in in Ireland, after investigating a dispute caused by diverse gauges in Ireland.
- The Regulating the Gauge of Railways Act 1846 made this gauge mandatory on the island of Ireland.
- The Swiss Northern Railway was opened, converted to standard gauge in 1854.
- The first Australian 5 ft 3 in line was opened, the Melbourne and Hobson's Bay Railway Company.
- The first Brazilian 5 ft 3 in railway was opened, the Companhia de Estrada de Ferro Dom Pedro II.
- The Canterbury Provincial Railways in New Zealand was built in 5 ft 3 in until gauge conversion to 3 ft 6 in (1,067 mm) in 1876
- In Ireland this gauge is known as Irish gauge.
- In Australia this gauge is known as Victorian Broad Gauge.
States of South Australia, Victoria (Victorian broad gauge), New South Wales (a few lines built by, and connected to, the Victorian rail system) and Tasmania, Australia (one line, Deloraine to Launceston, opened in 1871, partly converted to dual gauge, and then converted to 3 ft 6 in (1,067 mm) in 1888). The 125 km (77.7 mi) long Oaklands railway line, which runs into New South Wales from Victoria, was converted to standard gauge in 2009. The project was relatively easy because the line has wooden sleepers. 200 km (124.3 mi) of the Albury-Wodonga railway line, Victoria was converted to standard gauge in 2008-2011, meaning a double track standard gauge line was created between Seymour and Albury. The current network is 4,017 km or 2,496 mi, 10% of the total Australian rail network.
Main article: Rail transport in Brazil
Lines connecting the states of Rio de Janeiro, São Paulo and Minas Gerais; E.F.Carajás in Pará and Maranhão states, and Ferronorte in Mato Grosso and Mato Grosso do Sul states. Used in older Metro systems. Although metre gauge network is almost 5 times longer, Irish gauge is considered the standard by ABNT  The current network is 4,057 km or 2,521 mi, 15% of the total Brazilian network.
|Germany||Grand Duchy of Baden State Railway 1840 - 1855|
|Switzerland||Swiss Northern Railway between 1847 and 1854, converted 1,435 mm (4 ft 8 1⁄2 in) standard gauge.|
Main article: Rail transport in Ireland
|New Zealand||Canterbury Provincial Railways
(1863- ; All routes gauge converted to 3 ft 6 in (1,067 mm) by 1876)
See also: Rail transport in Ireland
Northern Ireland Railways - entire network, currently 330 km or 205 mi.
The Pennsylvania trolley gauges of 5 ft 2 1⁄2 in (1,588 mm) and 5 ft 2 1⁄4 in (1,581 mm) are similar to Irish gauge. There is also 5 ft 2 in (1,575 mm) gauge, which is similar as well. See: Track gauge in Ireland.
One of the supposed advantages of the broader 1,600 mm (5 ft 3 in) Irish gauge, compared to 1,435 mm (4 ft 8 1⁄2 in) standard gauge, is that the greater space between the wheels allows for bigger cylinders. In practice, Ireland does not have any heavily-loaded or steeply-graded lines that would require especially powerful locomotives. The most powerful steam locomotives on systems of this gauge were:
- Ireland - GSR Class 800 – Tractive effort: 155 kN (34,850 lbf)
- Victoria - Victorian Railways H class - 245 kN (55,080 lbf); 23.6 t (23.2 long tons; 26.0 short tons) axle load - 1 in 48 (2.1%) grade.
By comparison a non-articulated standard gauge locomotive in the same country was:
- Lewis, M. J. T. (2001), "Railways in the Greek and Roman world", in Guy, A.; Rees, J., Early Railways. A Selection of Papers from the First International Early Railways Conference (PDF), pp. 8–19 (10–15)
- "ODDS AND ENDS.". Colonial Times (Hobart, Tas. : 1828 - 1857) (Hobart, Tas.: National Library of Australia). 24 March 1846. p. 4. Retrieved 21 August 2012.
- Dublin's Strangest Tales: Extraordinary But True Stories - Michael Barry, Patrick Sammon
- Cast Into the Unknown - Mike W. Harry - page 30
- Back on Track: Rethinking Transport Policy in Australia and New Zealand - Philip Laird, Mark Bachels
- Transfer of gauge, a useful railway invention - Sunday Times (Perth, WA : 1902 - 1954) Sunday 8 June 1902 Supplement, page 1
- Newer Metro systems use 1,435 mm (4 ft 8 1⁄2 in) standard gauge.
- Rieger, Bernhard (2006-04-23). "Breitspurbahn". Retrieved 2007-11-29.
- Cochrane, Gerry (2009). Back in Steam: the Downpatrick and County Down Railway from 1982. Newtownards: Colourpoint. p. 95. ISBN 978-1-906578-29-9.
- Iarnród Éireann website, infrastructure section