Misplaced Pages

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66-488: Different track gauges were used in different parts of the world including 600mm , 760 mm ( 2 ft  5 + 15 ⁄ 16  in ), 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ) metre gauge and 1,050 mm ( 3 ft  5 + 11 ⁄ 32  in ). The military light railways in France were of 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) gauge and used

132-488: A banking locomotive. At the bottom of Marley's Bank the line turns sharply north and runs along the level to Leedon Loop. The line here passes through housing. After Leedon, the railway crosses Hockliffe Road and crosses the Clipstone Brook and begins to climb again on a 1 in 50 (2%) gradient to cross Vandyke Road. Immediately after crossing Vandyke Road the line curves 90 degrees to Vandyke Junction where there

198-446: A flexible and reliable method of supplying the front lines, bringing shells, timber, and fodder from the rear areas and their standard gauge supply points. Narrow gauge light railways were the solution. Hundreds of locomotives were built by companies such as Hunslet , Kerr Stuart , ALCO , Davenport , Motor Rail and Baldwin to work these lines. Also, Model T Ford conversions were used. Thirty or so Companies were formed within

264-616: A gauge of 5 ft 6 in ( 1,676 mm ), and the Ulster Railway of 1839 used 6 ft 2 in ( 1,880 mm ). Locomotives were being developed in the first decades of the 19th century; they took various forms, but George Stephenson developed a successful locomotive on the Killingworth Wagonway , where he worked. His designs were successful, and when the Stockton and Darlington Railway

330-580: A novelty in the shape of a mixed-gauge goods train was introduced between Truro and Penzance. It was worked by a narrow-gauge engine, and behind the narrow-gauge trucks came a broad-gauge match-truck with wide buffers and sliding shackles, followed by the broad-gauge trucks. Such trains continued to run in West Cornwall until the abolition of the Broad Gauge; they had to stop or come down to walking pace at all stations where fixed points existed and

396-663: A public park in Mackay, restored at the Rail Workshops Museum, currently on display at the Rail Workshops Museum, North Ipswich, Queensland, Australia Surplus Motor Rail internal combustion locomotives were sold off after the war and provided service for decades in industrial narrow gauge railways systems, such as the Leighton Buzzard Light Railway . The larger (40HP) locomotives came in 'open', 'protected', and 'armoured' versions resulting in

462-431: A rail network must have wheelsets that are compatible with the track gauge. Since many different track gauges exist worldwide, gauge differences often present a barrier to wider operation on railway networks. The term derives from the metal bar, or gauge, that is used to ensure the distance between the rails is correct. Railways also deploy two other gauges to ensure compliance with a required standard. A loading gauge

528-645: A relatively static disposition of infantry, requiring considerable logistics to bring them support staff and supplies (food, ammunition, earthworks materials, etc.). Dense light railway networks using temporary narrow gauge track sections were established by both sides for this purpose. Leighton Buzzard Light Railway The Leighton Buzzard Light Railway (LBLR) is a light railway in Leighton Buzzard in Bedfordshire , England . It operates on 2 ft ( 610 mm ) narrow-gauge track and

594-657: A slight variation from the nominal gauge for pragmatic reasons. The gauge is defined in imperial units , metric units or SI units. Imperial units were established in the United Kingdom by the Weights and Measures Act 1824 . The United States customary units for length did not agree with the imperial system until 1959, when one international yard was defined as 0.9144 meters and, as derived units, 1 foot (= 1 ⁄ 3  yd) as 0.3048 meter and 1 inch (= 1 ⁄ 36  yd) as 25.4 mm. The list shows

660-640: A train of three bogie wagons borrowed from the railway. By 1968 the line was more lightly used and the Iron Horse Society began regular passenger services on the line. Part of the agreement between the railway and the volunteers was that volunteers would repair the permanent way . This was undertaken, the group having purchased secondhand rolling stock and four Simplex diesels from the St Albans Sand and Gravel company, which were dismantled and formed into one machine. The last sand train ran on

726-485: A variety of steam and petrol locomotives from French , British and American builders. The Germans installed their 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) gauge Feldbahn system early in the war. Trench railways of the World War I western front produced the greatest concentration of minimum-gauge railway locomotives observed to date. Britain came to the belated realisation that it needed

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792-592: Is a collection of industrial railway locomotives at Stonehenge Works towards the northern end of the line. The railway is promoted by the Campaign to Protect Rural England . On 22 June 2013, John Travolta visited the railway with his son Benjamin. The line is unusual as it runs mostly through modern housing built since the 1970s, although the last half mile runs through countryside. There are open level crossings for which trains stop. The railway began at Grovebury Sidings, where sand trains unloaded into washers and

858-420: Is a two-dimensional profile that encompasses a cross-section of the track, a rail vehicle and a maximum-sized load: all rail vehicles and their loads must be contained in the corresponding envelope. A structure gauge specifies the outline into which structures (bridges, platforms, lineside equipment etc.) must not encroach. The most common use of the term "track gauge" refers to the transverse distance between

924-508: Is currently with D.Revell, Weewaa, New South Wales, Australia. This is the locomotive which is now preserved at the Australian War Memorial, Canberra, Australia, although she may be in store and not on public display. Hunslet 4-6-0 Locomotive no. 1229 of 1916, formerly of Cattle Creek Mill, is currently stored at ANGRMS, Woodford QLD, Australia. Awaiting restoration. Hunslet 4-6-0 Locomotive no. 1239 of 1916, retrieved from

990-422: Is generally known world-wide as being 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Terms such as broad gauge and narrow gauge do not have any fixed meaning beyond being materially wider or narrower than standard. In British practice, the space between the rails of a track is colloquially referred to as the "four-foot", and the space between two tracks the "six-foot", descriptions relating to

1056-504: Is just under 3 miles (4.8 km) long. The line was built after the First World War to serve sand quarries north of the town. In the late 1960s the quarries switched to road transport and the railway was taken over by volunteers, who now run the line as a heritage railway . A bed of Lower Cretaceous sand across Bedfordshire has been quarried on a small scale for centuries. The most significant occur around Leighton Buzzard. In

1122-554: Is the dominant gauge in countries in Indian subcontinent, the former Soviet Union ( CIS states, Baltic states, Georgia and Ukraine), Mongolia, Finland (which still uses the original Soviet Gauge of 1524mm), Spain, Portugal, Argentina, Chile and Ireland. It is also used for the suburban railway systems in South Australia , and Victoria , Australia . The term "medium gauge" had different meanings throughout history, depending on

1188-552: Is the dominant or second dominant gauge in countries of Southern, Central Africa, East Africa, Southeast Asia, Japan, Taiwan, Philippines, Central America and South America, During the period known as " the Battle of the gauges ", Stephenson's standard gauge was commonly known as "narrow gauge", while Brunel's railway's 7 ft  1 ⁄ 4  in ( 2,140 mm ) gauge was termed " broad gauge ". Many narrow gauge railways were built in mountainous regions such as Wales ,

1254-506: Is typically greater for track limited to slower speeds, and tighter for track where higher speeds are expected (as an example, in the US the gauge is allowed to vary between 4 ft 8 in (1,420 mm) to 4 ft 10 in (1,470 mm) for track limited to 10 mph (16 km/h), while 70 mph (110 km/h) track is allowed only 4 ft 8 in (1,420 mm) to 4 ft 9 + 1 ⁄ 2  in (1,460 mm). Given

1320-410: Is undertaken when no other alternative is available. The nominal track gauge is the distance between the inner faces of the rails. In current practice, it is specified at a certain distance below the rail head as the inner faces of the rail head (the gauge faces ) are not necessarily vertical. Some amount of tolerance is necessarily allowed from the nominal gauge to allow for wear, etc.; this tolerance

1386-550: Is used between China and Central Asia, and between Poland and Ukraine, using the SUW 2000 and INTERGAUGE variable axle systems. China and Poland use standard gauge, while Central Asia and Ukraine use 1,520 mm ( 4 ft  11 + 27 ⁄ 32  in ). When individual railway companies have chosen different gauges and have needed to share a route where space on the ground is limited, mixed gauge (or dual gauge) track, in which three (sometimes four) rails are supported in

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1452-599: The Bratislava – Lviv train, and the Romania/Moldova border on the Chișinău – Bucharest train. A system developed by Talgo and Construcciones y Auxiliar de Ferrocarriles (CAF) of Spain uses variable gauge wheelsets ; at the border between France and Spain, through passenger trains are drawn slowly through an apparatus that alters the gauge of the wheels, which slide laterally on the axles. A similar system

1518-528: The Great Western Railway adopted a gauge of 7 ft ( 2,134 mm ), later eased to 7 ft  1 ⁄ 4  in ( 2,140 mm ). This became known as broad gauge . The Great Western Railway (GWR) was successful and was greatly expanded, directly and through friendly associated companies, widening the scope of broad gauge. At the same time, other parts of Britain built railways to standard gauge, and British technology

1584-686: The Monkland and Kirkintilloch Railway (1826) in the West of Scotland used 4 ft 6 in ( 1,372 mm ); the Dundee and Newtyle Railway (1831) in the north-east of Scotland adopted 4 ft  6 + 1 ⁄ 2  in ( 1,384 mm ); the Redruth and Chasewater Railway (1825) in Cornwall chose 4 ft ( 1,219 mm ). The Arbroath and Forfar Railway opened in 1838 with

1650-1013: The Rocky Mountains of North America, Central Europe and South America. Industrial railways and mine railways across the world are often narrow gauge. Sugar cane and banana plantations are mostly served by narrow gauges. Very narrow gauges of under 2 feet (610 mm) were used for some industrial railways in space-restricted environments such as mines or farms. The French company Decauville developed 500 mm ( 19 + 3 ⁄ 4  in ) and 400 mm ( 15 + 3 ⁄ 4  in ) tracks, mainly for mines; Heywood developed 15 in ( 381 mm ) gauge for estate railways . The most common minimum gauges were 15 in ( 381 mm ), 400 mm ( 15 + 3 ⁄ 4  in ), 16 in ( 406 mm ), 18 in ( 457 mm ), 500 mm ( 19 + 3 ⁄ 4  in ) or 20 in ( 508 mm ). Through operation between railway networks with different gauges

1716-628: The Royal Engineers to staff the lines. These were mostly British ex-railwaymen pressed into service, though Australian, South African and Canadian gangs served with distinction. An American unit also served under the British flag. Each area of the front would have its own light rail to bring up materiel. The British perfected roll on roll off train ferries to bring fodder and supplies direct from England via train ferries to France. Northern French rail lines were under direct military control of

1782-496: The Transmongolian Railway , Russia and Mongolia use 1,520 mm ( 4 ft  11 + 27 ⁄ 32  in ) while China uses the standard gauge of 1,435 mm. At the border, each carriage is lifted and its bogies are changed . The operation can take several hours for a whole train of many carriages. Other examples include crossings into or out of the former Soviet Union: Ukraine/Slovakia border on

1848-572: The 19th century sand was carried by horse carts from quarries south of the town to be shipped on the Dunstable - Leighton Buzzard railway. The carts damaged roads and resulted in claims for compensation against the quarry owners from Bedfordshire County Council. At the end of the century steam wagons were introduced which increased the damage to roads. The outbreak of the First World War cut off supplies of foundry sand from Belgium . Sand

1914-766: The Army in the area. By 1917, the Canadians led the way in showing the utility of light railways. Having built thousands of miles of new frontier track in Western Canada in the previous decades, these "colonials", led by J. Stewart, supplied the Canadian Corps who went on to victory at Vimy . From this the light railways were expanded to 700 miles (1,100 km) of track, which supplied 7,000 tons of supplies daily. The ebb and flow of war meant that rail lines were built and rebuilt, moved and used elsewhere, but by

1980-650: The French Army and the U.S. Army had their own locomotives, which included: Probably the most famous of these war service engines were of class 10-12-D , built by the Baldwin Locomotive Works , U.S. Nearly 500 were built and those that survived the war found new homes around the world. Many went to India and after the war a few went to railways in Britain including: Four of this type of locomotive have been repatriated from India and preserved in

2046-543: The GWR's broad gauge continued to grow. The larger railway companies wished to expand geographically, and large areas were considered to be under their control. When a new independent line was proposed to open up an unconnected area, the gauge was crucial in determining the allegiance that the line would adopt: if it was broad gauge, it must be friendly to the Great Western railway; if narrow (standard) gauge, it must favour

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2112-405: The GWR, there was an extended period between political intervention in 1846 that prevented major expansion of its 7 ft  1 ⁄ 4  in ( 2,140 mm ) broad gauge and the final gauge conversion to standard gauge in 1892. During this period, many locations practicality required mixed gauge operation, and in station areas the track configuration was extremely complex. This

2178-724: The UK, two in full working order, and the other two undergoing restoration in 2021. Hunslet 4-6-0 Locomotive no. 1215 of 1916, was repatriated from Australia in 2008 where she had worked since 1924 on the sugar cane railways of Queensland, before ending up at Rowan Bay Bush Children's Home in a playground around 1962. She is currently in full working order at the Moseley Railway Trust 's Apedale Valley Light Railway, Newcastle-under-Lyme, Staffordshire, United Kingdom. Hunslet 4-6-0 Locomotive no. 1218 of 1916, formerly of Gin Gin Mill,

2244-402: The allowed tolerance, it is a common practice to widen the gauge slightly in curves, particularly those of shorter radius (which are inherently slower speed curves). Rolling stock on the network must have running gear ( wheelsets ) that are compatible with the gauge, and therefore the gauge is a key parameter in determining interoperability, but there are many others – see below. In some cases in

2310-561: The convenience in laying it and changing its location over unimproved ground. In restricted spaces such as tunnels, the temporary way might be double track even though the tunnel will ultimately be single track. The Airport Rail Link in Sydney had construction trains of 900 mm ( 2 ft  11 + 7 ⁄ 16  in ) gauge, which were replaced by permanent tracks of 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) gauge. During World War I, trench warfare led to

2376-492: The curious spectacle of fully armoured locomotives appearing in an industrial context. Many locomotives were overhauled and/or modified by Kent Construction & Engineering Co. Ltd of Ashford which can complicate identifying locomotives (for example "Mary Ann" - the Ffestiniog Loco). Track gauge In rail transport , track gauge is the distance between the two rails of a railway track . All vehicles on

2442-448: The earliest days of railways, the railway company saw itself as an infrastructure provider only, and independent hauliers provided wagons suited to the gauge. Colloquially the wagons might be referred to as "four-foot gauge wagons", say, if the track had a gauge of four feet. This nominal value does not equate to the flange spacing, as some freedom is allowed for. An infrastructure manager might specify new or replacement track components at

2508-513: The far end of the line) with the mainline railway south of the town at Grovebury sidings. The line was built using surplus equipment from the War Department Light Railways . The railway was built to a gauge of 2 ft ( 610 mm ) and laid using mostly 30 lb/yd (14.9 kg/m) rail. The line opened using steam traction by two Hudswell Clarke 0-6-0 side tank steam locomotives . These proved inappropriate for

2574-404: The gauge selection was pragmatic: the track would have to fit the rolling stock. If locomotives were imported from elsewhere, especially in the early days, the track would be built to fit them. In some cases standard gauge was adopted, but many countries or companies chose a different gauge as their national gauge, either by governmental policy, or as a matter of individual choice. Standard gauge

2640-610: The growing problem, and this led to the Regulating the Gauge of Railways Act 1846 , which forbade the construction of broad gauge lines unconnected with the broad gauge network. The broad gauge network was eventually converted—a progressive process completed in 1892, called gauge conversion . The same Act mandated the gauge of 5 ft 3 in ( 1,600 mm ) for use in Ireland. As railways were built in other countries,

2706-423: The imperial and other units that have been used for track gauge definitions: A temporary way is the temporary track often used for construction, to be replaced by the permanent way (the structure consisting of the rails, fasteners, sleepers/ties and ballast (or slab track), plus the underlying subgrade) when construction nears completion. In many cases narrow-gauge track is used for a temporary way because of

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2772-416: The inside surfaces of the two load-bearing rails of a railway track , usually measured at 12.7 millimetres (0.50 inches) to 15.9 millimetres (0.63 inches) below the top of the rail head in order to clear worn corners and allow for rail heads having sloping sides. The term derives from the "gauge", a metal bar with a precisely positioned lug at each end that track crews use to ensure the actual distance between

2838-490: The latter years of Passchendaele , Amiens and Argonne , light railways came into their own and pulled for the final victory. A large number of locomotives (mostly of 600 mm ( 1 ft  11 + 5 ⁄ 8  in ) gauge) was ordered for the WDLR. These included: A few captured German feldbahn locomotives were also used but these usually had short lives because no spare parts were available for them. Both

2904-552: The local dominant gauge in use. In 1840s, the 1,600 mm ( 5 ft 3 in ) Irish gauge was considered a medium gauge compared to Brunel's 7 ft  1 ⁄ 4  in ( 2,140 mm ) broad gauge and the 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) narrow gauge, which became the modern standard gauge . In modern usage, the term "narrow gauge" generally refers to track spaced significantly narrower than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Narrow gauge

2970-432: The main line in 1969, although several quarries continued to use the lines within their quarries. These were eventually replaced by roads and conveyor belts and the last internal quarry line was abandoned in 1981. Today the line is run purely as a heritage railway . A large collection of steam and internal combustion locomotives run on the line. Visitors can ride the train and are issued with an Edmondson ticket . There

3036-404: The narrow portion side-stepped to right or left. In rare situations, three different gauges may converge on to a rail yard and triple-gauge track is needed to meet the operational needs of the break-of-gauge station – most commonly where there is insufficient space to do otherwise. Construction and operation of triple-gauge track and its signalling, however, involves immense cost and disruption, and

3102-416: The other companies. The battle to persuade or coerce that choice became very intense, and became referred to as "the gauge wars" . As passenger and freight transport between the two areas became increasingly important, the difficulty of moving from one gauge to the other—the break of gauge —became more prominent and more objectionable. In 1845 a Royal Commission on Railway Gauges was created to look into

3168-545: The rails lies within tolerances of a prescribed standard: on curves, for example, the spacing is wider than normal. Deriving from the name of the bar, the distance between these rails is also referred to as the track gauge. The earliest form of railway was a wooden wagonway, along which single wagons were manhandled, almost always in or from a mine or quarry. Initially the wagons were guided by human muscle power; subsequently by various mechanical methods. Timber rails wore rapidly: later, flat cast-iron plates were provided to limit

3234-604: The respective dimensions. In modern usage the term "standard gauge" refers to 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Standard gauge is dominant in a majority of countries, including those in North America, most of western Europe, North Africa, the Middle East, and China. In modern usage, the term "broad gauge" generally refers to track spaced significantly wider than 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ). Broad gauge

3300-475: The roads. By the mid-1960s only one sand quarry, Arnold's, still used the light railway. The BR line to Dunstable was closed in 1965, apart from a short stretch from Leighton Buzzard to Grovebury interchange sidings, which survived until 1969. In November 1966 "The Iron Horse Railway Preservation Society" was formed with the objective of running passenger services on the line. They ran their first excursion on 3 March 1966. using two Simplex locomotives at each end of

3366-416: The same track structure, can be necessary. The most frequent need for such track was at the approaches to city terminals or at break-of-gauge stations. Tracks of multiple gauges involve considerable costs in construction (including signalling work) and complexities in track maintenance, and may require some speed restrictions. They are therefore built only when absolutely necessary. If the difference between

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3432-543: The sand was shipped to standard-gauge trains on the Dunstable branch or to road. The sidings and industrial plant at Grovebury were replaced with an industrial estate in the early 1970s. Trains from Grovebury crossed Billington Road by a level crossing and worked up a steep grade to Page's Park. Here a branch line south connected to the line's main engineering workshop and the Pratt's Pit quarry. In 2006 Page's Park forms

3498-453: The southern terminus of the heritage railway. From Page's Park the line curves north towards a summit at Red Barn. From there it descends at 1 in 60 (1.7%) before climbing again to cross Stanbridge Road. On the left is the site of Marley's Tile Works, now a housing estate, which was connected to the railway for most of its existence. The line descends Marley's Bank at a maximum of 1 in 25 (4%). Loaded sand trains to Grovebury Sidings often needed

3564-532: The tightly-curved line and the steam locomotives were sold in 1921. From that point the railway was run using internal combustion, almost exclusively the products of the Motor Rail company. It was one of the first railways in Britain entirely operated by internal combustion. After the Second World War sand traffic returned to the roads. In 1953 a strike on mainline railways pushed more traffic onto

3630-463: The track could be extended from the immediate vicinity of the mine or quarry, typically to a navigable waterway. The wagons were built to a consistent pattern and the track would be made to suit the needs of the horses and wagons: the gauge was more critical. The Penydarren Tramroad of 1802 in South Wales, a plateway, spaced these at 4 ft 4 in ( 1,321 mm ) over the outside of

3696-617: The two gauges is large enough – for example between 1,435 mm ( 4 ft  8 + 1 ⁄ 2  in ) standard gauge and 3 ft 6 in ( 1,067 mm ) – three-rail dual-gauge is possible, but if not – for example between 3 ft 6 in ( 1,067 mm ) and 1,000 mm ( 3 ft  3 + 3 ⁄ 8  in ) metre gauge – four rails must be used. Dual-gauge rail lines occur (or have occurred) in Argentina, Australia, Brazil, Japan, North Korea, Spain, Switzerland, Tunisia and Vietnam. On

3762-452: The upstands. The Penydarren Tramroad probably carried the first journey by a locomotive, in 1804, and it was successful for the locomotive, but unsuccessful for the track: the plates were not strong enough to carry its weight. A considerable progressive step was made when cast iron edge rails were first employed; these had the major axis of the rail section configured vertically, giving a much stronger section to resist bending forces, and this

3828-415: The wear. In some localities, the plates were made L-shaped, with the vertical part of the L guiding the wheels; this is generally referred to as a "plateway". Flanged wheels eventually became universal, and the spacing between the rails had to be compatible with that of the wagon wheels. As the guidance of the wagons was improved, short strings of wagons could be connected and pulled by teams of horses, and

3894-481: Was a passing loop. Here the branch line from Chamberlain's Barn and New Trees quarries joined the main line. A short section of this branch remains intact although heritage trains do not use it. The railway then runs parallel to Vandyke Road, climbing steadily to Bryan's Loop then descending again to cross the Shenley Hill Road. The line levels and continues to Stonehenge Works now the engineering workshop of

3960-441: Was compounded by the common rail having to be at the platform side in stations; therefore, in many cases, standard-gauge trains needed to be switched from one side of the track to the other at the approach. A special fixed point arrangement was devised for the purpose, where the track layout was simple enough. In some cases, mixed gauge trains were operated with wagons of both gauges. For example, MacDermot wrote: In November 1871

4026-550: Was exported to European countries and parts of North America, also using standard gauge. Britain polarised into two areas: those that used broad gauge and those that used standard gauge. In this context, standard gauge was referred to as "narrow gauge" to indicate the contrast. Some smaller concerns selected other non-standard gauges: the Eastern Counties Railway adopted 5 ft ( 1,524 mm ). Most of them converted to standard gauge at an early date, but

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4092-497: Was further improved when fish-belly rails were introduced. Edge rails required a close match between rail spacing and the configuration of the wheelsets, and the importance of the gauge was reinforced. Railways were still seen as local concerns: there was no appreciation of a future connection to other lines, and the choice of track gauge was still a pragmatic decision based on local requirements and prejudices, and probably determined by existing local designs of (road) vehicles. Thus,

4158-404: Was needed for ammunition factories and new sources were sought. Leighton Buzzard sands proved well suited and production increased. After 1919 the quarry companies were told they could no longer transport sand by roads, so a private industrial railway was proposed to take the traffic. Leighton Buzzard Light Railway opened on Thursday 20 November 1919, linking the sand quarries ( Double Arches at

4224-582: Was opened in 1825, it used his locomotives, with the same gauge as the Killingworth line , 4 ft 8 in ( 1,422 mm ). The Stockton and Darlington line was very successful, and when the Liverpool and Manchester Railway , the first intercity line, was opened in 1830, it used the same gauge. It too was very successful, and the gauge, widened to 4 ft  8 + 1 ⁄ 2  in or 1,435 mm and named " standard gauge ",

4290-532: Was originally impossible; goods had to be transshipped and passengers had to change trains. This was obviously a major obstacle to convenient transport, and in Great Britain, led to political intervention. On narrow gauge lines, rollbocks or transporter wagons are used: standard gauge wagons are carried on narrow gauge lines on these special vehicles, generally with rails of the wider gauge to enable those vehicles to roll on and off at transfer points. On

4356-556: Was well on its way to becoming the established norm. The Liverpool and Manchester was quickly followed by other trunk railways, with the Grand Junction Railway and the London and Birmingham Railway forming a huge preponderance of standard gauge . When Bristol promoters planned a line from London, they employed the innovative engineer Isambard Kingdom Brunel . He decided on a wider gauge, to give greater stability, and

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