4 ft 6 in gauge railway

The 4 ft 6 in (1,372 mm) track gauge, also called the Scotch gauge, was adopted by early 19th century railways mainly in the Lanarkshire area of Scotland. It differed from the gauge of 4 ft 8 in (1,422 mm) that was used on some early lines in England. Early railways chose their own gauge, but later in the century interchange of equipment was facilitated by establishing a uniform rail gauge across railways: a so-called 'standard gauge' of 4 ft 8+1⁄2 in (1,435 mm). In the early 1840s standard gauge lines began to be constructed in Scotland, and all the Scotch gauge lines were eventually converted to standard gauge. The gauge was outlawed in Great Britain in 1846. From 1903, tram lines of Tokyo adopted this gauge.

Scottish railways built to Scotch gauge[]

A section of original 1831 Scotch gauge track relaid at Eglinton Country Park in North Ayrshire.

A 15-foot (4.57 m) length of flat-bottomed Vignoles rail from the Scotch gauge Ardrossan and Johnstone Railway

A small number of early to mid-19th century passenger railways were built to 4 ft 6 in (1,372 mm) Scotch gauge including:

Ardrossan and Johnstone Railway.^[1] Length: 10 miles (16 km).^[2] Authorised on 20 July 1806 and opened on 6 November 1810.^[3]
Monkland and Kirkintilloch Railway.^[4] Length: 10 miles (16 km).^[2] Authorised on 17 May 1824 and opened on 1 October 1826.^[3] The engineer was Thomas Grainger.^[4]
Ballochney Railway.^[1] Length: 6.5 miles (10.5 km).^[2] Incorporated on 19 May 1826 and opened on 8 August 1828.^[3]
Edinburgh and Dalkeith Railway.^[1] Authorised on 26 May 1826 and opened in part on 4 July 1831.^[3]
Garnkirk and Glasgow Railway.^[1] Length: 8.25 miles (13.3 km).^[2] Incorporated on 26 May 1826 and ceremonially opened on 27 September 1831 for both passengers and goods.^[3] The engineers were Thomas Grainger and John Miller from Edinburgh.^[1]^[4]
Wishaw and Coltness Railway.^[4] Length: 11 miles (17.7 km).^[2] Incorporated on 21 June 1829 and partially opened on 21 March 1834.^[3] The engineers were Thomas Grainger and John Miller from Edinburgh.^[4]
Slamannan Railway.^[1] Length: 12.5 miles (20.1 km).^[1]^[2] Incorporated on 3 July 1835 and opened on 31 August 1840.^[3]
Paisley and Renfrew Railway.^[1] Length: 3 miles (4.8 km).^[2] Authorised on 21 July 1835 and opened on 3 April 1837 for both passengers and goods.^[3] The engineer was Thomas Grainger.^[4] Converted to Standard Gauge 1866.

Robert Stephenson and Company built a Scotch gauge locomotive, the St. Rollox, for the Garnkirk and Glasgow Railway; which was later sold to the Paisley and Renfrew Railway.^[1]^[3]

All the lines were later relaid in standard gauge.^[1]^[3]

Other early 19th century Scottish gauges[]

4 ft 6½ in gauge[]

In addition to the above lines, there were three railways, authorised between 1822 and 1835, that were built in the Dundee area, to a gauge of 4 ft 6+1⁄2 in (1,384 mm). They were:

The Dundee and Newtyle Railway.^[1]^[4] Length: 10.5 miles (16.9 km).^[2]
The Newtyle and Coupar Angus Railway.^[1]^[4] Length: 6.5 miles (10.5 km).^[2]
The Newtyle and Glammis Railway.^[1]^[4] Length: 10 miles (16 km).^[2]

5 ft 6 in gauge[]

Grainger and Miller built another two railway lines in the same area to a gauge of 5 ft 6 in (1,676 mm). Thomas Grainger is said to have chosen this gauge, since he regarded 4 ft 8+1⁄2 in (1,435 mm) standard gauge as being too narrow and Isambard Kingdom Brunel's 7 ft 1⁄4 in (2,140 mm) Brunel gauge as being too wide.^[1] They were:

The Dundee and Arbroath Railway.^[1]^[4] Length: 14.5 miles (23 km).^[2] Incorporated on 19 May 1836 and opened in part in October 1838.^[3]
The Arbroath and Forfar Railway.^[1]^[4] Length: 15 miles (24 km).^[2] Incorporated on 19 May 1836 and opened in part on 24 November 1838.^[3]

End of Scotch gauge[]

The Glasgow, Paisley, Kilmarnock and Ayr Railway and the Glasgow, Paisley and Greenock Railway, which both obtained Parliamentary Approval on 15 July 1837 and were later to become part of the Glasgow and South Western Railway and the Caledonian Railway, respectively, were built to standard gauge from the start.^[1]

The standard gauge of 4 ft 8+1⁄2 in (1,435 mm), also known as the Stephenson gauge after George Stephenson, was adopted in Great Britain after 1846 after the passing of the Regulating the Gauge of Railways Act 1846.^[5] A few remnants of old lines remain, but are non functional with the exception of one example of the St Michael's Mount Tramway at St Michael's Mount in Cornwall. It is a partial underground railway that used to bring luggage up to the castle. It occasionally operates, but only for demonstration reasons and is not open to the general public, although a small stretch is visible at the harbour. It is therefore believed to be Britain's last functionally operational Scotch gauge railway.^[6]^[7]

Use in Japan[]

Keiō Line 1,372 mm (4 ft 6 in) gauge tracks

Map of railway lines with 1,372 mm gauge in Tokyo area

After the end of Scotch gauge in Britain, the gauge was revived in Japan. Since 1903, most of tram network in Tokyo was built with 4 ft 6 in (1,372 mm) rail gauge, called "coach gauge" (馬車軌間, Basha Kikan). The use of this gauge extended to other suburban lines that projected through services to the city tram. Although Tokyo has abolished its major tram network (except Arakawa Line), as of 2009, the following lines still use this gauge:

The Keiō Line and its branches (excluding the Inokashira Line). Reason to use 1372 mm in 1915 was to provide through service with the now-abolished Tokyo city tram.^[8] Length: 72.0 km (44.7 mi). Commuter railways connecting Tokyo and its suburb operated by Keio Corporation.
The Toei Shinjuku Line.^[8] Length: 23.5 km (14.6 mi). One of rapid transit lines in Tokyo, built to provide through service with the Keiō Line. Originally the Ministry of Transport intended Keiō Line convert to 1435 mm (so that Shinjuku Line have the same gauge as Asakusa Line for maintenance convenience), but the service area as of late 20th century was too densely populated to risk a massive disruption of Keiō service, and the Shinjuku Line was constructed 1372 mm instead.
The Toden Arakawa Line.^[8] Length: 12.2 km (7.6 mi). Only surviving line of Tokyo municipal tram.
The Tōkyū Setagaya Line.^[8] Length: 5.0 km (3.1 mi). Another tram line in Tokyo operated by Tokyu Corporation.
The Hakodate City Tram.^[8] Length: 10.9 km (6.8 mi). Only user of the gauge out of Greater Tokyo Area.

References[]

^ Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q Whishaw, Francis (1842). The Railways of Great Britain and Ireland practically described and illustrated. Second Edition. London: John Weale. Reprinted and republished 1969, Newton Abbott: David & Charles. ISBN 0-7153-4786-1.
^ Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Popplewell, Lawrence (1989). A Gazetteer of the Railway Contractors and Engineers of Scotland 1831 - 1870. (Vol. 1: 1831 - 1870 and Vol. 2: 1871 - 1914). Bournemouth: Melledgen Press. ISBN 0-906637-14-7.
^ Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Awdry, Christopher (1990). Encyclopaedia of British Railway Companies. London: Guild Publishing.
^ Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Robertson, C.J.A. (1983). The Origins of the Scottish Railway System: 1722-1844. Edinburgh: John Donald Publishers. ISBN 0-85976-088-X.
^ "Regulating the Gauge of Railways Act 1846" (PDF). Railways Archive. Retrieved 28 September 2016.
^ "St Michaels Mount, Cornish Cliff Railway". Hows Website. Archived from the original on 5 November 2016. Retrieved 28 September 2016.
^ "St Michael's Mount Cliff Railway". South Western Historical Society. Retrieved 28 September 2016.
^ Jump up to: ^a ^b ^c ^d ^e Tetsudō Kyoku; Ministry of Land, Infrastructure, Transport and Tourism (2008). Tetsudō Yōran (Heisei 20 Nendo) (in Japanese). Tokyo: Denkisha Kenkyūkai. ISBN 978-4-88548-112-3.

(1971). A Regional History of the Railways of Great Britain. Volume 6 Scotland: The Lowlands and the Borders. Newton Abbott: David & Charles. ISBN 0-7153-5408-6.

[whishall-1] Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q Whishaw, Francis (1842). The Railways of Great Britain and Ireland practically described and illustrated. Second Edition. London: John Weale. Reprinted and republished 1969, Newton Abbott: David & Charles. ISBN 0-7153-4786-1.

[popplewell-2] Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Popplewell, Lawrence (1989). A Gazetteer of the Railway Contractors and Engineers of Scotland 1831 - 1870. (Vol. 1: 1831 - 1870 and Vol. 2: 1871 - 1914). Bournemouth: Melledgen Press. ISBN 0-906637-14-7.

[awdry-3] Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Awdry, Christopher (1990). Encyclopaedia of British Railway Companies. London: Guild Publishing.

[robertson-4] Jump up to: ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Robertson, C.J.A. (1983). The Origins of the Scottish Railway System: 1722-1844. Edinburgh: John Donald Publishers. ISBN 0-85976-088-X.

[5] "Regulating the Gauge of Railways Act 1846" (PDF). Railways Archive. Retrieved 28 September 2016.

[6] "St Michaels Mount, Cornish Cliff Railway". Hows Website. Archived from the original on 5 November 2016. Retrieved 28 September 2016.

[7] "St Michael's Mount Cliff Railway". South Western Historical Society. Retrieved 28 September 2016.

[yoran-8] Jump up to: ^a ^b ^c ^d ^e Tetsudō Kyoku; Ministry of Land, Infrastructure, Transport and Tourism (2008). Tetsudō Yōran (Heisei 20 Nendo) (in Japanese). Tokyo: Denkisha Kenkyūkai. ISBN 978-4-88548-112-3.

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show v t Historical Scottish railway companies
Primary companies	Caledonian Railway Glasgow and South Western Railway Great North of Scotland Railway Highland Railway North British Railway
Caledonian Railway	Aberdeen Railway Alloa Railway Alyth Arbroath and Forfar Busby Railway Cathcart District Clydesdale Junction Crieff Junction Crieff and Comrie Crieff and Methven Junction Dumfries, Lochmaben and Lockerbie Dunblane, Doune and Callander Dundee and Perth Dundee and Perth and Aberdeen Forfar and Brechin General Terminus and Glasgow Harbour Garnkirk and Glasgow Glasgow Central Railway Glasgow, Paisley and Greenock Greenock and Wemyss Bay Hamilton and Strathaven Lanarkshire and Ayrshire Lanarkshire and Dumbartonshire Leadhills and Wanlockhead Lesmahagow Railway Lochearnhead, St Fillans and Comrie Paisley and Barrhead District Perth, Almond Valley and Methven Polloc and Govan Rutherglen and Coatbridge Scottish Central Scottish Midland Junction Scottish North Eastern Solway Junction Symington, Biggar and Broughton Talla Railway Wishaw and Coltness Lines built by the Caledonian Railway Balerno line CR Cleland and Midcalder CR Main Line CR Hamilton Branch CR Hamiltonhill Branch CR The Switchback Independent lines worked by the Caledonian Railway Callander and Oban Killin Railway
Glasgow and South Western Railway	Ardrossan Railway Ardrossan and Johnstone Ayr and Dalmellington Ayr and Maybole Junction Ayr to Mauchline Ayrshire and Wigtownshire Barrhead Branch Bridge of Weir Railway Cairn Valley Caledonian and Dumbartonshire Junction Castle Douglas and Dumfries Dalry and North Johnstone Darvel Branch Girvan and Portpatrick Junction Glasgow, Dumfries and Carlisle Glasgow, Paisley, Kilmarnock and Ayr Greenock and Ayrshire Kilmarnock and Troon Largs Branch Maidens and Dunure Maybole and Girvan Paisley and Renfrew Paisley Canal Line
Great North of Scotland Railway	Aberdeen and Turriff Aboyne and Braemar Alford Valley Banff, Macduff and Turriff Junction Banff, Portsoy and Strathisla Deeside Denburn Valley Formartine and Buchan Inverury and Old Meldrum Junction Keith and Dufftown Moray Coast Morayshire Strathspey Railway
Highland Railway	Buckie and Portessie Branch Dingwall and Skye Duke of Sutherland Findhorn Railway Fortrose Branch Inverness and Aberdeen Junction Inverness and Aviemore Direct Inverness and Nairn Inverness and Perth Junction Inverness and Ross-shire Kyle of Lochalsh Extension Perth and Dunkeld Sutherland and Caithness Sutherland Railway Independent lines worked by the Highland Railway Dornoch Light Railway Wick and Lybster Light Railway
North British Railway	Aberlady, Gullane and North Berwick Anstruther and St Andrews Railway Ballochney Bathgate and Coatbridge Blane Valley Border Counties Railway Border Union Railway Campsie Branch Carlisle and Silloth Bay Railway and Dock Company Charlestown Railway and Harbour Company Coatbridge Branch Devon Valley Railway Dunfermline and Queensferry East of Fife Railway Edinburgh and Bathgate Edinburgh and Dalkeith Edinburgh and Glasgow Edinburgh and Hawick Edinburgh, Leith and Newhaven Railway Edinburgh, Loanhead and Roslin Railway Edinburgh and Northern Edinburgh Suburban and Southside Junction Esk Valley Eyemouth Railway Fife and Kinross Railway Forth and Clyde Junction Gifford and Garvald Glasgow, Bothwell, Hamilton and Coatbridge Glasgow City and District Glasgow, Dumbarton and Helensburgh Glasgow and Milngavie Junction Glasgow, Yoker and Clydebank Kelvin Valley Railway Kincardine Line Kinross-shire Railway Kirkcaldy and District Railway Leadburn, Linton and Dolphinton Leven Railway Leven and East of Fife Railway Macmerry Branch Monkland and Kirkintilloch Monkland Railways Montrose and Bervie Mallaig Extension Newburgh and North Fife Railway (worked by NBR) Newport Railway North Berwick Branch North British, Arbroath and Montrose Peebles Railway The St. Andrews Railway Stirling and Dunfermline Strathendrick and Aberfoyle Slamannan Slamannan and Borrowstounness Wemyss and Buckhaven Railway West Highland Railway West of Fife Mineral Railway Wilsontown, Morningside and Coltness
Joint lines	Caledonian and Dumbartonshire Junction City Union Dundee and Arbroath Darvel and Strathaven Glasgow and Paisley Joint Glasgow and Renfrew District Glasgow, Barrhead and Kilmarnock Joint Kilsyth and Bonnybridge Portpatrick and Wigtownshire Joint
Other lines	Brechin and Edzell District Campbeltown and Machrihanish Light Railway Cromarty and Dingwall Light Railway Dundee and Arbroath Hagdale Chromate Railway Invergarry and Fort Augustus Lealt Valley Diatomite Railway Lochaber Narrow Gauge Perth, Almond Valley and Methven Rothesay and Ettrick Bay Light Railway Skye Marble Railway Tranent to Cockenzie Waggonway

show v t Track gauge (list)
Minimum-gauge Minimum-gauge railways	15 in (381 mm) 400 mm (15+3⁄4 in) 16 in (406 mm) 18 in (457 mm) 19 in (483 mm) 500 mm (19+3⁄4 in) 20 in (508 mm) 21 in (533 mm) 1 ft 10 in (559 mm)
Narrow gauge	2 foot and 600 mm 750 mm (2 ft 5+1⁄2 in) 760 mm (2 ft 5+15⁄16 in) 2 ft 6 in (762 mm) 800 mm (2 ft 7+1⁄2 in) 891 mm (2 ft 11+3⁄32 in) Swedish three foot 900 mm (2 ft 11+7⁄16 in) 3 ft (914 mm) 950 mm (3 ft 1+3⁄8 in) Italian metre gauge 1,000 mm (3 ft 3+3⁄8 in) metre gauge 1,050 mm (3 ft 5+11⁄32 in), 1,055 mm (3 ft 5+1⁄2 in), 3 ft 6 in (1,067 mm) 1,093 mm (3 ft 7 in), 1,100 mm (3 ft 7+5⁄16 in), 1,200 mm (3 ft 11+1⁄4 in) 4 ft (1,219 mm) 4 ft 1 in (1,245 mm), Middleton Railway 4 ft 6 in (1,372 mm), Scotch gauge 4 ft 6+1⁄2 in (1,384 mm), Scotch gauge 4 ft 7+3⁄4 in (1,416 mm) 4 ft 8 in (1,422 mm), almost standard gauge 4 ft 8+1⁄4 in (1,429 mm) 1,432 mm (4 ft 8+3⁄8 in)
Standard gauge	4 ft 8+1⁄2 in / 1,435 mm, Stephenson gauge
Broad gauge	1,440 mm (4 ft 8+11⁄16 in) 1,445 mm (4 ft 8+7⁄8 in) 1,450 mm (4 ft 9+3⁄32 in) 4 ft 9+3⁄8 in (1,457 mm) 1,458 mm (4 ft 9+13⁄32 in) 4 ft 10+7⁄8 in (1,495 mm), Toronto gauge 5 ft / 1,524 mm and 1,520 mm (4 ft 11+27⁄32 in), Russian gauge. 5 ft 2+1⁄4 in / 1,581 mm and 5 ft 2+1⁄2 in / 1,588 mm, Pennsylvania gauge 5 ft 3 in (1,600 mm), Irish gauge 5 ft 4+1⁄2 in (1,638 mm), Baltimore gauge 1,668 mm (5 ft 5+21⁄32 in), Iberian gauge 5 ft 6 in (1,676 mm), Indian gauge 7 ft 1⁄4 in (2,140 mm), Brunel gauge 3,000 mm (9 ft 10+1⁄8 in), Breitspurbahn 8,200 mm (26 ft 10+27⁄32 in), Lärchwandschrägaufzug 9,000 mm (29 ft 6+5⁄16 in), Krasnoyarsk Dam
List of track gauge articles	List of track gauges List of tram track gauges Miniature railways Minimum-gauge railways Large amusement railways
Gauge differences	Bogie exchange Break of gauge Dual gauge Gauge conversion list Variable gauge
Transport mode	Tram and light rail Rapid transit Miniature Scale model
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