View source for Break of gauge

{{Short description|Meeting place of different width rail lines}}
{{more citations needed|date=January 2016}}
{{Sidebar track gauge}}

[[File:World RR Gauge Map.agr.png|thumb|300px|Map of the world's railways showing the different gauges in use. Breaks of gauge generally occur where lines of different [[track gauge]] meet.]]

With railways, a '''break of gauge''' occurs where a line of one [[track gauge]] (the distance between the rails, or between the wheels of trains designed to run on those rails) meets a line of a different gauge. Trains and [[railroad car|rolling stock]] generally cannot run through without some form of [[bogie exchange|conversion between gauges]], leading to [[passenger]]s having to change trains, and [[cargo|freight]] having to be [[transloading|transloaded]] or [[transshipping|transshipped]]. That can cause delays, added costs, and inconvenience to those travelling on affected routes.

==History==
Break of gauge was a common problem in the early days of railways, because standards had not yet been set and different organizations each used their own favored gauge on the lines they controlled. That was sometimes for mechanical and engineering reasons (optimizing for geography or particular types of load and rolling stock), and sometimes for commercial and competitive reasons (interoperability, or the lack of it, within and between companies and alliances were often key strategic considerations).

Even in the early era of railways in Britain, various solutions other than transloading were conceived,.<ref name="Rolt1989">{{Harvnb|Rolt|1989}}.</ref>{{rp|202–203}} including [[rollbock]]s, [[transporter wagon]]s, [[dual gauge]] track or [[variable gauge]] axles, and [[containerization]] of freight, but they were not implemented at the height of the [[Gauge War]] in the 1840s, which resulted the need for time-consuming and expensive transloading.<ref name="Rolt1989"/>{{rp|202–203}}

In his biography of [[Isambard Kingdom Brunel]] (key proponent of the [[Great Western Railway#Brunel's 7-foot gauge and the "gauge war"|broad gauge for the Great Western Railway]]), [[L. T. C. Rolt]] remarks on the apparent mysteriousness of that lack of implementation,<ref name="Rolt1989"/>{{rp|202–203}} but a likely explanation is that the combatants at the time were primarily interested in winning the Gauge War, and establishing a standard that benefited their commercial interests.

The lack of a standardized gauge was a significant problem in transportation in the [[Confederate States of America]] during the [[American Civil War]].

See the [[#Examples|examples]] section below for a range of international examples of different types, including a break of gauge in [[Gloucester]], which was the earliest significant break of gauge between the {{RailGauge|1435mm}} and {{RailGauge|7ft0.25in|lk=on}} systems, and the first break of gauge between Russian and standard gauge built in 1861 between the border stations of [[Chernyshevskoye|Eydtkuhnen]] (then East Prussia, now Russia) and [[Kybartai]] (then Russia, now Lithuania).

==Overcoming a break of gauge==
[[File:Break of gauge GWR Gloucester.jpg|thumb|A cartoon depicting the "horrors of goods transfer" at the break of gauge at [[Gloucester railway station|Gloucester]] in 1843]]
Where trains encounter a different gauge, such as at the borders between Spain and France or between Russia and China, the traditional solution has been [[transloading]] ([[transloading#Transloading versus transshipment|often called transshipment in discussions of break of gauge]]), that is, the transfer of passengers and freight to cars on the other system. When transloading from one gauge to another, often the quantities of rolling stock are unbalanced between the two systems, leading to more idle rolling stock on one system than the other.

===Bogie exchange and variable gauge===
{{main|Bogie exchange|Variable gauge}}
One common method to avoid transshipment is to build cars to the smaller of the two systems' [[loading gauge]]s with bogies that are easily removed and replaced with other bogies at an [[Bogie exchange|interchange]] location on the border. This takes a few minutes per car, but is quicker than [[Transloading#Transloading facilities|transshipment]] of goods.

A more modern and sophisticated method is to have multigauge bogies with [[Wheelset (rail transport)|wheelsets]] whose wheels can be [[Variable gauge|moved inwards and outwards]]. Normally they are locked in place, but special equipment at the border unloads and unlocks the wheels and pushes them inward or outward to the new gauge, relocking and reloading the wheels when done. This is done as the train moves slowly over the special equipment.

===Dual gauge and track gauge conversion===
{{main|Dual gauge|Track gauge conversion}}
In some cases, breaks of gauge are avoided by installing dual-gauge track, either permanently or as part of a [[Track gauge conversion|changeover process]] to a single gauge.

===Piggyback operation===
{{main|Rollbock|Transporter wagon}}
One method of achieving interoperability between [[rolling stock]] of different gauges is to [[Piggyback (transportation)#Rail|piggyback]] stock of one gauge on special transporter wagons or even ordinary flat wagons fitted with rails. This enables rolling stock to reach workshops and other lines of the same gauge to which they are not otherwise connected. [[Transporter wagon|Piggyback]] operation by the trainload occurred as a temporary measure between [[Port Augusta railway station|Port Augusta]] and [[Marree railway station|Marree]] during [[gauge conversion]] work in the 1950s to bypass steep gradients and [[washaways]] in the [[Flinders Ranges]].<ref>{{cite web|url=http://www.southaustralianhistory.com.au/railways.htm|title=Piggyback picture|access-date=December 5, 2011|archive-date=February 24, 2012|archive-url=https://web.archive.org/web/20120224201358/http://www.southaustralianhistory.com.au/railways.htm|url-status=dead}}</ref><ref>{{cite web|url=http://www.southaustralianhistory.com.au/company.htm|title=Flinders Ranges Research}}</ref>

[[Narrow-gauge railways]] were favoured in the underground slate quarries of [[North Wales]], as tunnels could be smaller. The [[Padarn Railway]] operated transporter wagons on their {{RailGauge|4ft|lk=on}} gauge railway, each carrying four {{RailGauge|1ft10.75in}} slate trams. When the [[Great Western Railway]] acquired one of the narrow-gauge lines in [[Blaenau Ffestiniog]], it deployed a similar type of transporter wagon to allow continued use of the quarries' existing slate wagons.<ref>{{cite journal |last=Gray |first=Adrian |date= Winter 1994 |title=G. W. R. Slate Tram Transporter Wagons |journal=British Railway Journal |issue=50 |pages=17–24}}</ref>

Transporter wagons are most commonly used to transport narrow-gauge stock along standard-gauge lines.

At the [[Guinness brewery]] in [[Dublin]] there used to be {{RailGauge|1ft10in}} internal narrow gauge and {{RailGauge|5ft3in|lk=on}} gauge (standard gauge for Ireland), and to avoid the need for steam locomotives of both gauges the narrow-gauge engines were provided with standard-gauge converter wagons (named "haulage trucks"). The narrow-gauge steam locomotive was lowered into the haulage truck using a gantry, and its wheels rested on rollers, which in turn drove the haulage wagon wheels via a 3:1 reduction gear. Several of these locomotives survived into preservation, including locomotive No23 complete with haulage wagon and lifting gantry preserved at Brockham museum in 1966, and now at the [[Amberley Museum Railway]].

More rarely, standard-gauge vehicles are carried over narrow-gauge tracks using adaptor vehicles; examples include the [[Rollbock]]e transporter wagon arrangements in Germany, Austria, and the Czech Republic, and the milk transporter wagons of the [[Leek and Manifold Valley Light Railway]] in England.

{{As of|2010}}, Japan is developing the [[Train on Train]] piggyback concept.

===Containerisation===
{{Main|Containerisation}} 
The internationally widespread use of standard [[Intermodal container#Rail|intermodal containers]] since the 1960s has made break of gauge less of a problem, since containers can be efficiently transferred from one mode or train to another by specialized [[Container crane|cranes]].

Greater efficiency is achieved when the lengths of the wagons on each gauge are the same, so that the containers can be transferred from one train to the other with no longitudinal movement. The speed of the transfer depends, among other factors, on how many cranes can operate simultaneously at the transfer location.

Container cranes are relatively portable, so that if the break of gauge transshipment hub changes from time to time, the cranes can be moved around as required. [[Fork lift]] trucks can also be used.

For example, when containers are shipped by a "direct train" from China to Europe, it is only containers, and not the railcars, which move from China's railway network to that of Kazakhstan. At the [[Altynkol railway station]] near the border at [[Khorgos]], two trains (the Chinese {{RailGauge|sg|allk=on|disp=or}} one and the Kazakh {{RailGauge|1520mm|lk=on|disp=or}} one) are placed side by side at parallel tracks, while gantry cranes move the containers from one train to the other in as short a time as 47 minutes.<ref name="forbes2016">{{citation|
url=https://www.forbes.com/sites/wadeshepard/2016/01/28/why-china-europe-silk-road-rail-transport-is-growing-fast
|date=2016-01-28
|title=Why The China-Europe 'Silk Road' Rail Network Is Growing Fast
|first=Wade |last=Shepard 
|periodical=Forbes 
}}</ref><ref>See satellite views of [[Altynkol railway station]] using coordinates in that article.</ref>

==Types==
===Minor breaks of gauge===
Wherever there are narrow-gauge lines that connect with a standard-gauge line, there is technically a break of gauge. If the amount of traffic transferred between lines is small, this might be a small inconvenience only. In Austria and Switzerland there are numerous breaks-of-gauge between standard-gauge main lines and narrow-gauge railways.

[[File:Bahnhöfe der Schweiz mit zwei verschiedenen Spurweiten, geocoded photos on OSM map, Sept 2022.png|thumb|Stations in Switzerland with two different track gauges, 2022 (map based on Wikimedia Commons image locations)]]
Many internal Swiss railways that operate in the more mountainous regions are {{RailGauge|1000mm|allk=on}}, and most are equipped with [[rack railway|rack]] assistance to deal with the relatively steep gradients encountered.<ref>{{cite web|url=http://www.bueker.net/trainspotting/map.php?file=maps/switzerland/switzerland.gif|access-date=2011-02-19|title=enlarged map}}</ref> Through running of standard-gauge trains on rack sections would not be possible, but dual-gauge track exists in many places where the gradient is relatively flat to carry standard- and metre-gauge stock. There are also some 800-mm-gauge railways which are entirely rack operated.

The effects of a minor break of gauge can be minimized by placing it at the point where a cargo must be removed from cars anyway. An example of this is the [[East Broad Top Railroad]] in the US, which had a [[coal breaker|coal wash and preparation plant]] at its break of gauge in [[Mount Union, Pennsylvania]]. The coal was unloaded from narrow-gauge cars of the EBTR, and after processing was loaded into standard-gauge cars of the [[Pennsylvania Railroad]].

=== Nominal breaks of gauge ===
The line between Finland and Russia has a nominal break of gauge; Finnish gauge is {{RailGauge|1524mm|lk=on}} whereas [[Russian gauge]] is {{RailGauge|1520mm|lk=on}}; the present Russian gauge is actually a redefinition of the older {{RailGauge|1524mm}}. This does not usually prevent through-running - service running across both gauges exists in the form of the [[Allegro (train)|Allegro]] high-speed service between Helsinki and St. Petersburg. The nominal {{convert|4|mm|abbr=on}} difference is generally within operating tolerances and does not cause problems or delays.

The [[Iberian gauge]] is actually three slightly different gauges: {{RailGauge|1672mm}} in Spain, {{RailGauge|1664mm}} in Portugal, and the newer, redefined {{RailGauge|1668mm|lk=on}}. Through-running is done with vehicles having a gauge within certain tolerances. [[Indian gauge]], {{RailGauge|1676mm|lk=on}}, is also compatible with Iberian gauge, although there are no actual railway connections between the two. Despite this, old Spanish and Portuguese rolling stock have been reused in Argentina and Chile, both of which use Indian gauge.

A nominal break of gauge with [[standard gauge]] exists as well: on the Hong Kong [[MTR]] network, lines owned by [[MTR Corporation]] used {{RailGauge|1432mm|lk=on}} before 2014. Newer lines and extensions use {{RailGauge|1435mm}} with nominal gauge break at [[Sheung Wan station]] and [[Yau Ma Tei station]]. {{RailGauge|1435mm}} is also employed on those owned by [[Kowloon-Canton Railway Corporation|KCR Corporation]], despite the lack of physical connections between the two networks.

=== Other types of breaks ===
A large railway may have main lines with heavy tracks, and branch lines with light track. Light locomotives and rolling stock can operate on all lines, but heavy locomotives and rolling stock can only operate on heavy track. Heavy rolling stock might be able to operate on lighter track at reduced speed. Light track can be upgraded to heavy track by installing heavy rails, etc., and this can be done without changing the track gauge.

==Gauge conversions==
{{Main|Track gauge conversion}}

===Gauge orphan===
When a main line is converted to a different gauge, branch lines can be cut off and made relatively useless, at least for freight trains, until they too are converted to the new gauge. These severed branches can be called '''gauge orphans'''.

===Gauge outreach===
The opposite of a gauge orphan is a line of one gauge which reaches into the territory composed mainly of another gauge. Examples include five {{railgauge|victorian}} broad-gauge lines from Victoria, Australia, which crossed the border into otherwise standard-gauge New South Wales. Similarly, the standard-gauge line from Albury to Melbourne in 1962 which eliminated most transshipment at Albury, especially the need for passengers to change trains in the middle of the night. The standard-gauge outreach from [[Kalgoorlie railway station|Kalgoorlie]] to [[Perth]] partly replaced the original {{railgauge|cape}} narrow-gauge line, and partly rebuilt that line with better curves and gradients as double-track dual gauge. Because of lack of space at the [[Perth railway station|main Perth station]], standard-gauge passenger trains terminate three stations short at [[East Perth railway station|East Perth]].

Three Russian broad-gauge lines reach out from Ukraine, one (the [[Uzhhorod–Košice broad-gauge track|Uzhhorod–Košice line]]) into Slovakia to carry minerals; another (the [[Broad Gauge Metallurgy Line|Metallurgy Line]]) into Poland to carry heavy iron ore and steel products without the need for transshipment as would be the case if there were a break of gauge at the border. There were plans to extend the Slovak line to Vienna<ref name=broad-gauge-to-wien-2010/> but these have been effectively killed by the Austrian government in 2021.<ref>{{cite news |first=Keith |last=Fender |title=Austrian government will not support broad gauge line |url=https://www.railjournal.com/infrastructure/austrian-government-will-not-support-broad-gauge-line/ |date=6 May 2021 |work=International Railway Journal |access-date=6 August 2021 }}</ref> The third one, from Polish-Ukrainian border to Przemyśl, is used for passenger connections to Lviv and Kiyv.

In 1994, the [[Rail Baltica]] proposal emerged to build a {{cvt|728|km}} north–south standard-gauge line to link European railways from Poland via [[Kaunas railway station|Kaunas]], Lithuania, and [[Riga Central Station|Riga]], Latvia, to [[Tallinn Baltic Station|Tallinn]], Estonia.<ref>{{cite magazine |url= https://www.railwaygazette.com/railway-gazette-international/railway-gazette-international-2011-digital-archive/53888.article |title= Railway Gazette International 2011 Digital Archive |author=<!--Not stated-->|date= July 2011 |magazine= Railway Gazette International |location= [[Hamburg]] |publisher= [[DVV Media Group|DVV Media International Ltd]] |issn= 0373-5346 |page= 25| access-date= 24 October 2022 }} [[File:Lock-red-alt-2.svg|9px|link=|alt=Paid subscription required|Paid subscription required]] <code>subscription</code>: the source is only accessible via a paid subscription ("[[paywall]]").</ref> The first stage, connecting Lithuanian-Polish border to Kaunas, was completed in 2015.

A standard-gauge line, extending from Belarusian-Polish border to Hrodna, is used for passenger connections to Białystok, Warsaw and Kraków. A standard-gauge line from Polish-Ukrainian border to Lviv is planned.<ref>{{cite web |last1=Zasiadko |first1=Mykola |title=Ukraine plans dual gauge railway to EU |url=https://www.railtech.com/infrastructure/2019/11/28/ukraine-plans-dual-gauge-railway-to-eu/ |website=RailTech.com |access-date=6 August 2021 |date=28 November 2019}}</ref>

==Other issues==
{{unreferenced section|date=December 2024}}
While track gauge is the most important factor preventing through running between adjacent systems, other issues can also be a hindrance, including [[structure gauge]], [[loading gauge]], [[axleload]]s, [[Railway coupling|couplings]], [[Railway brake#Air versus vacuum brakes|brakes]], [[railway electrification system|electrification systems]], [[railway signal|signalling]] systems, [[multiple unit]] controls, [[Safeworking|rules and regulations]], driver certification, righthand or lefthand running, repairs (how to make and pay for repairs while rolling stock is on other railway's territory) and language. The structure gauge, loading gauge and axleload problems are solved by simply using the smaller options for through running. The general solution is often to custom-build vehicles to fit all the standards to be encountered. Trains can be built to accept four voltages, to have dual signaling systems equipment, etc. All of these solutions, however, usually result in either more expensive trains or less comfort for passengers (e.g. through less room inside the train if it has a smaller loading gauge) or – in the case of freight railways – less room for cargo, making [[double-stack rail transport|double stacking]] impossible or other negative effects.

==Examples==

===Europe===

==== United Kingdom ====
* [[Gloucester]] was the earliest significant break of gauge between the {{RailGauge|1435mm}} and {{RailGauge|7ft0.25in|lk=on}} systems.
* 1864 – [[Southern Railway routes west of Salisbury#Break of Gauge|Yeovil]]

====5 foot and Russian gauge meeting standard gauge====
[[File:Bogie change station at Chop station Ukraine.jpg|thumb|Bogie-exchange station in Ukraine]]
* [[Poland]], [[Slovakia]], [[Hungary]] and [[Romania]] ({{RailGauge|1435mm}}).
:versus Former Soviet Union countries: Russia, [[Lithuania]], [[Belarus]], [[Ukraine]], [[Moldova]] ({{RailGauge|1520mm}}). Night trains are common, and they are often [[Bogie exchange|bogie-exchanged]].
*Finland ({{RailGauge|1524mm}}) and Sweden ({{RailGauge|1435mm}}), between [[Tornio]] and [[Haparanda]] via a short [[dual gauge]] bridge. Freight is generally [[Transloading#Transloading facilities|transloaded]]. No passenger trains. There is also a [[SeaRail]] [[train ferry]] (with {{RailGauge|1435mm}} on board) linking [[Turku]], Finland with [[Stockholm]], Sweden;<ref>[http://www.searail.net/en/index.html SeaRail ferry] {{Webarchive|url=https://web.archive.org/web/20091226152232/http://www.searail.net/en/index.html |date=December 26, 2009 }}. Retrieved 2010-03-18</ref> the Turku terminal handles [[Dual gauge|both gauges]].<ref>{{cite web|url=http://www.searail.net/en/services/collection_distribution.html|title=SeaRail Turku dual-gauge terminal|access-date=March 18, 2010|archive-url=https://web.archive.org/web/20110724060053/http://www.searail.net/en/services/collection_distribution.html|archive-date=July 24, 2011|url-status=dead}}</ref>
*[[Bulgaria]] ({{RailGauge|1435mm}}) [[Train ferry|railroad ferries]] to Ukraine, Russia and [[Georgia (country)|Georgia]] ({{RailGauge|1520mm}})
*Germany ({{RailGauge|1435mm}}) railroad ferries (from Sassnitz with {{RailGauge|1520mm}} on board) to Russia and Baltic States and to Finland (also from Travemünde with {{RailGauge|1435mm}} on board).
*[[Turkey]] and [[Iran]] versus [[Georgia (country)|Georgia]], [[Armenia]], [[Azerbaijan]], [[Turkmenistan]]
*While breaks of gauge are generally located near borders, the [[Uzhhorod – Košice broad gauge track|Uzhhorod – Košice line]] carrying iron ore from Ukraine extends into Slovakian territory to a steelworks near [[Košice]]<ref>{{cite web|url=http://www.sinfin.net/railways/world/slovakia.html|title=Railways in Slovakia}}</ref> and [http://www.breitspur.com/en/ there are plans to extend the line further west], to [[Vienna]].<ref name="broad-gauge-to-wien-2010">{{cite web|url=http://www.railwaygazette.com/nc/news/single-view/view/broad-gauge-to-wien-is-feasible-says-study.html|access-date=2010-12-21|title=Railway Gazette: Broad gauge to Wien is feasible, says study|archive-date=February 8, 2011|archive-url=https://web.archive.org/web/20110208063615/http://www.railwaygazette.com/nc/news/single-view/view/broad-gauge-to-wien-is-feasible-says-study.html|url-status=dead}}</ref> See also [[Rail gauge in Slovakia]].
*The historically first break of gauge between Russian and standard gauge was built in 1861 as dual gauge between the border stations of Eydtkuhnen, East Prussia and part of the German Empire (now [[Chernyshevskoye]] [[Kaliningrad Oblast]], Russia), and [[Kybartai]], then Russia, now Lithuania.
* The "1520 Strategic Partnership" was established{{When|date=October 2022}} to harmonise the gauges of Europe and Asia.<ref>{{cite magazine |url= https://www.railwaygazette.com/railway-gazette-international/railway-gazette-international-2011-digital-archive/53888.article |title= Railway Gazette International 2011 Digital Archive |author=<!--Not stated-->|date= October 2011 |magazine= Railway Gazette International |location= [[Hamburg]] |publisher= [[DVV Media Group|DVV Media International Ltd]] |issn= 0373-5346 |page= 48| access-date= 24 October 2022 }} [[File:Lock-red-alt-2.svg|9px|link=|alt=Paid subscription required|Paid subscription required]] <code>subscription</code>: the source is only accessible via a paid subscription ("[[paywall]]").</ref>

==== Iberian gauge meeting standard gauge ====
*France ({{RailGauge|1435mm|disp=or}}) and Spain ({{RailGauge|1668mm|disp=or}}), for example at [[Cerbère]] (FR) – [[Portbou]] (ES); [[Hendaye]] (FR) – [[Irun]] (ES) and [[Latour-de-Carol]] (FR)<ref group="note">At [[Latour-de-Carol-Enveitg station]] three lines meet, each with a different gauge: [[Iberian gauge]] to Puigcerdà, Barcelona and L'Hospitalet de Llobregat, [[standard gauge]] with regional trains to Toulouse and night trains to Paris, and [[metre gauge]] on the [[Ligne de Cerdagne]] line to [[Villefranche-de-Conflent]].</ref> – [[Puigcerdà]] (ES). From 2010 the [[:Category:High-speed railway lines in Spain|Spanish high-speed network]] ({{RailGauge|1435mm|disp=or}}) was connected to the French railways without a break of gauge.
[[File:Talgo Variable Gauge Axle.jpg|thumb|[[Variable gauge axle]]s on a Spanish train designed for intercity travel to France]]
The earliest working example of the [[axle changing system|axle-changing system]] at the French-Spain border in 1948 had the [[axle]]s being changed at the rate of 8 wagons or 32 axles per hour.<ref>{{cite news |url=http://nla.gov.au/nla.news-article48647650 |title=Break of gauge device pleases |newspaper=[[The Barrier Miner]] |location=Broken Hill, NSW |date=July 16, 1951 |access-date=November 3, 2011 |page=5 |publisher=National Library of Australia}}</ref>

====Local narrow-gauge lines meeting mainlines====
*Switzerland, see "[[Break of gauge#Minor breaks of gauge|Minor breaks of gauge]]" section above.
*The Harzer Schmalspurbahn took over a standard-gauge line from Deutsche Bahn when the latter had no more use for it and regauged it to meter gauge to prevent the problems of break of gauge. Nonetheless, a break of gauge (and a change of train operator) still occurs at the point where that line connects to the rest of the DB network. DB itself has no break of gauge problems as the only non-standard-gauge railway it operates is on the island of Wangerooge without any train connection to the mainland.

=== North America ===
The [[Track gauge in the United States|United States of America]] had broad-, narrow-, and standard-gauge tracks in the 19th century, but is now almost entirely {{RailGauge|1435mm}} standard gauge. [[Narrow gauge railroads in the United States|Narrow-gauge operations]] are generally confined to isolated rail systems, with a few notable exceptions.
*{{flagicon|Guatemala}} {{flagicon|Mexico}} A break of gauge, {{RailGauge|3ft}} to {{RailGauge|ussg}}, between [[Rail transport in Guatemala|Guatemala]] and [[Rail transport in Mexico|Mexico]] is currently{{When|date=October 2022}} closed.
*{{flagicon|USA}} In [[Antonito, Colorado]], there was a break between the standard-gauge [[Rio Grande Scenic Railroad]] and the narrow-gauge [[Cumbres and Toltec Scenic Railroad]], billed as the [https://web.archive.org/web/20091219152629/http://www.riograndescenicrailroad.com/Tickets-and-Train-Schedules/Tickets-Routes-and-Schedules.html#tg Toltec Gorge Limited]. The former Rio Grande Scenic Railroad operates now as the freight-only [[Colorado Pacific Rio Grande Railroad]], which still has track to Antonito but no interaction with the Cumbres & Toltec. 
*{{flagicon|USA}} [[BART]] in the [[San Francisco Bay Area]] has a [[cross-platform interchange]] between the electrified {{Railgauge|1,676 mm}} broad-gauge {{lnl|BART|Yellow}} and non-electrified standard gauge [[eBART]] at a transfer platform east of [[Pittsburg/Bay Point station]]. The eBART system is designed to allow the new trackage to be electrified and regauged for BART mainline trains at a later date.<ref>{{cite news|last1=Gary Richards|first1=Gary Richards|title=Roadshow: eBART trains along Highway 4 could be running in 2017|url=http://www.contracostatimes.com/mr-roadshow/ci_25479165/roadshow-ebart-trains-along-highway-4-could-be|access-date=February 24, 2015|work=Contra Costa Times|publisher=MNG Corporate|date=April 4, 2014}}</ref>
*{{flagicon|USA}} [[69th Street Transportation Center]] in [[Upper Darby Township, Pennsylvania]] is a break of gauge between the {{Railgauge|Pennsylvania gauge}} [[Market–Frankford Line]] and [[Media–Sharon Hill Line]], and the standard gauge [[Norristown High Speed Line]].

===South America===
*Argentina and Chile both use {{RailGauge|1676mm}} broad-gauge tracks, but [[Transandine Railway|the link railway]] uses {{RailGauge|1000mm}} narrow gauge with [[rack railway]] sections. There are two break-of-gauge stations, one at [[Los Andes, Chile]], and the other at [[Mendoza, Argentina]].
*In 2022, Brazil has 22,539 km of lines in {{RailGauge|1000mm}} metre-gauge; 7,432 km in {{RailGauge|1600mm}} broad-gauge and 514 km in mixed gauge of both 1,000 mm and 1,600 mm.<ref>{{cite journal|author=Pelissari, Felipe; Biedacha, Marina; Noronha, Marcos; Bisconsini, Danilo|year=2023|title=Bitolas ferroviárias no Brasil: uma análise de integração da malha nacional|language=Portuguese|journal=Observatório de la Economía Latinoamericana|volume=21 |issue=6 |pages=5711–5732 |doi=10.55905/oelv21n6-132|s2cid=259725182 |doi-access=free}}</ref>
*A break of gauge exists between [[Transportation in Argentina|Argentina]] and [[Transportation in Brazil|Brazil]], {{RailGauge|1435mm}} to {{RailGauge|1000mm}}.
*A break of gauge exists between [[Transport in Uruguay|Uruguay]] and Brazil, {{RailGauge|1435mm}} to {{RailGauge|1000mm}} at [[Santana do Livramento]].
[[File:China - Russia Railway.jpg|thumb|A train on [[w:Standard-gauge railway|1435 mm]] standard-gauge track leaving [[China–Russia border|Russia]]. It is bound for [[Manzhouli]], [[China]], having replaced its [[w:5 ft and 1520 mm gauge railways#Expansion|1520 mm-gauge]] bogies with standard-gauge bogies at the bogie exchange yard in the distance.]]

===Asia===
====China====
[[Rail transport in China|China]] has a standard-gauge network; neighbouring countries [[Rail transport in Mongolia|Mongolia]], [[Rail transport in Russia|Russia]] and [[Qazaqstan Temir Zholy|Kazakhstan]] use {{RailGauge|1520mm}} gauge, and [[Vietnam]] mostly uses {{RailGauge|1000mm}} ([[metre gauge]]), so there are some breaks of gauge. See the [[Trans-Manchurian Railway]] (gauge changing at [[Zabaikalsk]] on the Russian side of the border), the [[Trans-Mongolian Railway]] and the [[Lanxin railway]]. The [[Yunnan–Vietnam Railway]] is narrow gauge, and is connected to standard-gauge tracks both in [[Kunming]] and in [[Hekou North Railway Station|Hekou]].<ref name="luhao20150424">{{citation|url=http://www.peoplerail.com/rail/show-456-224377-1.html
|title=昆明铁路局：国际铁路联运开启云南货运新篇章 (Kunming Railway Bureau: An international railway link opens a new chapter in Yunnan's freigh transportation)
|date=2015-04-24|last1=Lu |first1=Hua (陆华)|last2=Guo|first2=Weina (郭薇娜)}}</ref>
The [[Nanning]]-[[Hanoi]] line is dual gauge in Vietnam as far as Hanoi.<ref>[http://www.vr.com.vn/english/hientaihoatdong.html The length of Vietnam railway network] {{webarchive|url=https://web.archive.org/web/20100418132723/http://www.vr.com.vn/english/hientaihoatdong.html |date=April 18, 2010 }}</ref> There is currently a break of gauge at [[Dostyk]] on the Kazakh border. Kazakhstan was planning to build an additional line using standard gauge,<ref>{{cite web|url=http://www.railwaygazette.com/news/single-view/view/trans-kazakhstan-link-will-complete-standard-gauge-transcontinental-artery/browse/4.html
|date=August 1, 2004 |access-date=April 28, 2011
|work=Railway Gazette |title=Trans-Kazakhstan link will complete standard-gauge transcontinental artery
}}</ref> between Dostyk and [[Aktogay, East Kazakhstan Province|Aktogay]] but the scheme was abandoned.

====Iran====
[[Rail transport in Iran|Iran]], with its standard-gauge rail system, has a break of gauge with {{RailGauge|1520mm}} gauge at the borders with [[Azerbaijan]] and [[Turkmenistan]], and also with [[Rail transport in Pakistan|Pakistan's]] [[5 ft 6 in gauge railway]] at [[Zahedan]]. The break-of-gauge station at Zahedan was built outside the city, as the existing station was hemmed in by built-up areas.<ref>{{cite news| url=http://www.railwaygazette.com/nc/news/single-view/view/closing-the-gap-from-bam-to-zahedan.html| title=Closing the gap from Bam to Zahedan| work=[[Railway Gazette International]]| first=John| last=Stubbs| date=January 1, 2007| access-date=May 26, 2011 }}</ref>
[[File:Free Gauge Train GCT-01 at kamogawa.jpg|thumb|The first-generation, experimental [[Gauge Change Train]] as seen in 2003]]

====Japan====
All high-speed "[[Shinkansen]]" routes in Japan have been built as standard-gauge lines. A few routes, known as "[[Super Tokkyū]]", have been planned as narrow-gauge {{RailGauge|3ft6in}}, and the conventional (non-high-speed) is mostly narrow-gauge {{RailGauge|3ft6in}}, so there are some breaks of gauge and dual gauge is used in some places. Private railways often use other gauges.

While most of the Japanese urban rail/metro lines use {{RailGauge|1067mm}} rail gauge, a considerable number of lines (including all lines of the [[Osaka Metro]]) are still using their own different gauges including {{RailGauge|762mm}}, {{RailGauge|1372mm}}, and {{RailGauge|1435mm}}.<ref>{{Cite web |url=http://www.jterc.or.jp/topics/josei_shinpo3.14/5_chokutu_unten.pdf |title=Archived copy |access-date=June 20, 2016 |archive-date=October 12, 2016 |archive-url=https://web.archive.org/web/20161012170523/http://www.jterc.or.jp/topics/josei_shinpo3.14/5_chokutu_unten.pdf |url-status=dead }}</ref>

In 2010, [[Hokkaido Railway Company]] (JR Hokkaido) started working{{Update inline|date=August 2020}} on a transporter train by trainload concept called "[[Train on Train]]" to carry narrow-gauge freight trains at faster speeds on standard-gauge flatcars. The [[Seikan Tunnel]] has been converted by JR Hokkaido to dual gauge to accommodate the [[Hokkaido Shinkansen]].{{Citation needed|reason=Unsourced claim|date=August 2020}}

An experimental program for a variable gauge "[[Gauge Change Train]]" started in 1998 as a means to allow through services from high-speed standard-gauge Shinkansen lines to narrow-gauge regional lines. Its first deployment was expected to be the [[Kyushu Shinkansen]] Nagasaki route. However, the program was cancelled in 2008.<ref>{{Cite news |date=2008-08-24 |url= https://jp.reuters.com/article/idJP2018082401002106|title=新幹線のＦＧＴ導入を断念 |newspaper= Reuters|language=ja |access-date= 2020-06-21}}</ref>

====North Korea====
The [[Rail transport in North Korea|North Korea]]n rail system has some breaks of gauge. Several parts of the [[Paektusan Ch'ŏngnyŏn Line]] on the stretch between Wiyŏn and Hyesan Ch'ŏngnyŏn are dual gauged to allow connections to the [[Paektusan Rimch'ŏl Line]] and the [[Samjiyŏn Line]].<ref>{{Cite web|url=http://www.cybernk.net/infoText/InfoHumanCultureDetail.aspx?mc=CC0501&sc=A33005001&tid=CC040100007874&direct=1&direct=1|title = 북한지역정보넷}}</ref> Also, the line connecting to the [[Trans-Siberian Railway]] from [[Rason]] to [[Tumangang station|Tumangang]] and the [[Korea Russia Friendship Bridge|Korea-Russia Friendship Bridge]] is dual gauged for standard gauge and Russian gauge.<ref>{{cite web|url=http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=100&oid=112&aid=0002232229|title=라진-하산(러시아) 철도, 10월 중순 첫 시험운행|publisher=news.naver.com}}</ref> Originally the dual gauge may have reached as far as [[Khasan (urban-type settlement)|Khasan]], but as of 2021 the standard gauge track has been taken up on the Russian side of the bridge.<ref>{{Cite news|url=https://www.bbc.co.uk/news/world-asia-56206033|title = North Korea: Russian diplomats leave by hand-pushed trolley|work = BBC News|date = February 26, 2021}}</ref>

====Sakhalin====
In the 20th century, railroads on the entire Sakhalin used the same {{RailGauge|3ft6in}} narrow gauge as Japan, as part of it was under Japan's control when railway construction began. One stretch of rail that used {{RailGauge|600mm}} narrow gauge was converted to match the {{RailGauge|3ft6in}} narrow gauge after Russia took control of it.

Starting from the 1970s, a train ferry service was provided to connect Sakhalin and the Russia mainland, requiring bogie exchange on wagons to allow operation on the Russian mainland {{RailGauge|1520mm}} broad gauge.

In 2003, the Russian government started to convert the entire network to dual gauge with {{RailGauge|3ft6in}} and {{RailGauge|1520mm}}. Work is 70% done as of 2016, and is expected to be complete by 2018. The entire island's rolling stock is expected to be replaced by {{RailGauge|1520mm}} rolling stock by 2020, thus eliminating the break of gauge between Sakhalin and the Russian mainland.<ref>{{cite web|url=http://www.interfax-russia.ru/FarEast/news.asp?id=730322&sec=1671|title=Новости - Дальневосточный федеральный округ - interfax-russia.ru|website=www.interfax-russia.ru|date=May 30, 2016 }}</ref>

==== Taiwan ====
[[File:Taiwan's railways.png|thumb|Taiwan's railways consist of {{cvt|345|km}} of high-speed line (shown in orange) and {{cvt|1100|km}} of others. As in other countries, the high-speed line mainly conveys passengers and time-sensitive parcels, so very little transfer occurs between the two systems.]]

Like Japan, [[rail transport in Taiwan]] uses the {{RailGauge|3ft6in}} gauge for the majority of its railway network, but {{RailGauge|sg}} standard gauge for its high-speed rail; however, gauge differences are less of a problem as [[Taiwan High Speed Rail]] generally uses separate rolling stock and its own separate railway, and at most locations runs on routes kilometres away from the conventional [[Taiwan Railways Administration]] railway network.

===Africa===
* Rail lines linked by [[train ferry|ferries]] on convenient rivers or lakes.
* [[Dar es Salaam]] is one of the few places in Africa where different gauges actually meet.
* [[Kidatu]] in [[Tanzania]] has a container transshipment facility to move freight containers between [[TAZARA Railway|TAZARA]] {{RailGauge|1067mm}} and [[Tanzania Railways Corporation]] trains {{RailGauge|1000mm}}
* [[Democratic Republic of the Congo|D. R. Congo]] originally had both {{RailGauge|1000mm}} and {{RailGauge|3ft6in}} lines, but when these lines met in the 1950s, the {{RailGauge|1000mm}} line was converted to {{RailGauge|3ft6in}}.
* In the rest of Africa, railways of different gauges in adjacent countries often do not actually meet, so there is no actual break of gauge.

===Australia===
[[File:Cross-section of Australian triple-gauge track.png|thumb|Placement of rails when it is necessary for track to be triple-gauge – in this case, {{RailGauge|1600mm}}, {{RailGauge|1435mm}} and {{RailGauge|1067mm}}, as at Gladstone and Peterborough in South Australia]]

[[File:AlburyRailwayStationPlatform.jpg|thumb|The former break-of-gauge platform for on the [[Sydney–Melbourne railway|Sydney–Melbourne mainline]] at [[Albury railway station|Albury station]]: [[standard gauge]] on the left; [[broad gauge]] on the right. It was here that [[Mark Twain]] changed trains in the middle of the night and formed his pungent view<ref name="Twain">{{cite web |url= http://www.online-literature.com/twain/following-the-equator/14/ |title=  Following the Equator |first= Mark |last= Twain |date= 2020 |website= The Literature Network|access-date= 27 May 2020 }}</ref> of "the paralysis of intellect that gave that idea birth".]]

[[File:Map (reconstructed) of the 1945 Clapp Report proposals for standardisation of Australia's railways.png|thumb|Harold Clapp's 1945 proposals for standardisation of Australia's three main railway gauges. Standardisation of the {{cvt|4352|km}} [[East–west rail corridor (Australia)|east–west route]] was achieved only in 1970; linking of all mainland capital cities in 1995; and completion of a {{cvt|2975|km}} [[Adelaide–Darwin railway|north–south route]] in 2004. (Click to enlarge.)]]

==== Origins of Australia's multi-gauge muddle====
In 1845, the ''[[South Australian]]'' newspaper mentioned the convening of a [[Royal Commission on Railway Gauges|Royal Commission]] in Britain "inquiring whether, in future private acts of parliament for the construction of railways, provision ought to be made for securing a uniform gauge, and whether ... to bring the railways already constructed, or in progress ... into uniformity". It continued, "Since the colonists are now moving the question of railroads, we direct their special attention to the following. A uniform gauge will be of the utmost importance to the internal traffic of the province;<ref group="note">That is, South Australia.</ref> and the time to determine the proper and most convenient width of the rail, is at the commencement".<ref>{{cite news |title= The proposed railroad |newspaper=The South Australian |url= https://trove.nla.gov.au/newspaper/page/6250292 |volume= VIII |issue=686 |location=(Original, Adelaide. Digital reproduction, Canberra|publisher=National Library of Australia – Trove digital newspaper archive |date= 12 December 1845 |page=3 |access-date=27 May 2020}}</ref>

South Australia and New South Wales<ref group="note">Victoria had not yet become a separate colony from New South Wales; the colonies would not [[Federation of Australia|federate]] until 1901.</ref> then agreed to adopt the {{RailGauge|impsg}} gauge: [[South Australia]] in 1847<ref>{{cite news |url=http://nla.gov.au/nla.news-article71609590 |title=Proceedings of the Legislative Council. |newspaper=[[The South Australian]] |location=Adelaide |date=October 8, 1847 |access-date=November 26, 2011 |page=3 |publisher=National Library of Australia}}</ref><ref name="autogenerated2">{{cite news |url=http://nla.gov.au/nla.news-article59769848 |title=Local Intelligence. |newspaper=[[Bell's Life in Sydney and Sporting Reviewer]] |date=December 1, 1849 |access-date=November 27, 2011 |page=2 |publisher=National Library of Australia}}</ref> and [[New South Wales]] in 1848.<ref name="autogenerated2"/>

However, in 1850, New South Wales decided to change to {{RailGauge|63in}}, or [[Irish gauge]]. The change was approved by the British government, and South Australia agreed to follow suit.<ref>{{cite news |url=http://nla.gov.au/nla.news-article38441575 |title=Railway Papers. |newspaper=[[South Australian Register]] |location=Adelaide |date=August 28, 1851 |access-date=November 27, 2011 |page=3 |publisher=National Library of Australia}}</ref> However, in 1853, New South Wales unilaterally reverted to the {{RailGauge|impsg}} gauge. South Australia and [[Victoria (Australia)|Victoria]], the latter now separated from New South Wales, protested about the broken agreement, to no avail. Because they had already invested in broad-gauge track, locomotives and rolling stock, they continued construction.

There followed years of nationally uncoordinated railway construction designed not to serve the needs of the nation but the needs of the railways' parent colonies. They made their gauge choices in accordance with their perception of their own economic and geographical circumstances and to buttress, if not promote, their individual identities as colonies.<ref>{{cite thesis |url= https://research-repository.griffith.edu.au/handle/10072/366364 |title= Australia's mixed gauge railway system: a reassessment of its origins |first= John A. | last= Mills |date= 1 June 2010 |website= Griffith University |doi= 10.25904/1912/426 |access-date= 27 May 2020 |type= Griffith thesis }}</ref>

It was to be 90 years before a national investigation of standardisation of gauges was undertaken, in 1945.<ref>Report into the Standardisation of Australia’s Rail Gauges, Sir Harold Clapp, 1945. National Archives of Australia: series A5954, item 717/2</ref> Progress after that was still very slow, largely confined to linking all mainland capital cities with standard-gauge lines – achieved only in 1982.<ref name="muddle">{{cite web |url= https://nrm.org.au/assets/pdfdocs/collections/multi-gauge-muddle.pdf |title= South Australia's mixed gauge muddle |last= Vincent|first= Graham |date= 2013 |website= National Railway Museum [South Australia]|publisher= National Railway Museum |access-date= 14 August 2019 }}</ref>

The American writer, [[Mark Twain]], in 1879 summed up his experience of changing trains at [[Albury railway station|Albury]] on a journey to [[Southern Cross railway station|Melbourne]]:<ref name= Twain/>{{blockquote| {{resize| Now comes a singular thing: the oddest thing, the strangest thing, the most baffling and unaccountable marvel that Australasia can show. At the frontier between New South Wales and Victoria our multitude of passengers were routed out of their snug beds by lantern-light in the morning in the biting-cold of a high altitude to change cars on a road that has no break in it from Sydney to Melbourne! Think of the paralysis of intellect that gave that idea birth; imagine the boulder it emerged from on some petrified legislator's shoulders.}}}}

The greatest number of break-of-gauge stations was in South Australia. There, {{RailGauge|5ft3in|lk=on}} and {{RailGauge|3ft6in|lk=on}} lines met, both at the time of their introduction and – at different places – of their gradual transition to standardisation, first to broad gauge and then to standard gauge. At various times these stations were:<ref>{{cite web |url= http://www.railmaps.com.au/austrail_detail.htm |title= National rail map |author=<!--Not stated--> |date= 2020 |website= Australian rail maps |access-date= 28 May 2020 }}</ref> 
*[[Hamley Bridge]]
*[[Terowie railway station|Terowie]]
*[[Peterborough railway station, South Australia|Peterborough]]
*[[Gladstone railway station, South Australia|Gladstone]]
*three stations at various times at [[Port Pirie railway station (disambiguation)|Port Pirie]]
*[[Port Augusta railway station|Port Augusta]]
*[[Marree railway station|Marree]]
*[[Wolseley, South Australia|Wolseley]]
*[[Mount Gambier railway station|Mount Gambier]].

====Snapshot of Australian gauges, 2021====
In broad terms,<ref group="note">Ignoring preserved railways and tramways, the most notable being Victoria's [[Puffing Billy Railway]] ({{RailGauge|762mm|lk=on}}) and South Australia's [[Pichi Richi Railway]] ({{RailGauge|1067mm|lk=on}}) and [[SteamRanger]] ({{RailGauge|1600mm|lk=on}}).</ref> Australia's railway gauges were as follows in 2020:
{| class=wikitable
! State & <br> primary gauge !! Other gauge(s) !! Notes
|-
|rowspan=2| [[Queensland]] <br> {{RailGauge|1067mm}} || {{nowrap|{{RailGauge|Standard}}}} || [[Brisbane]] to the New South Wales border
|-
| {{RailGauge|610mm}} || several thousand kilometres of lightweight trackage for transport of sugar cane
|-
| {{nowrap|[[New South Wales]] <br> {{RailGauge|1435mm}}}} || {{RailGauge|1600mm}} || the [[Deniliquin railway line|Deniliquin]], [[Tocumwal railway line, Victoria|Tocumwal]], and the disused [[Balranald railway line|Moulamein]] lines, which run from Victoria into the state
|-
| [[Victoria, Australia|Victoria]] <br> {{RailGauge|1600mm}} || {{RailGauge|Standard}} || from Melbourne to the New South Wales border and from Melbourne to the South Australia border, and branch lines to [[Mildura railway line|Yelta]], [[Portland railway line|Portland]], [[Hopetoun railway line|Hopetoun]], plus several others
|-
|rowspan=3| [[South Australia]] || {{RailGauge|1600mm}} || in the [[Adelaide]] suburban area
|-
| {{RailGauge|Standard}} || lines to Western Australia, Victoria, New South Wales and the Northern Territory
|-
| {{RailGauge|1067mm}} || one line carrying gypsum in the far west, and others carrying iron ore to [[Whyalla]] 
|-
| Western Australia <br> {{RailGauge|1067mm}} || {{RailGauge|Standard}} || from [[Perth]] to the South Australian border and, branching from it at [[Kalgoorlie]], south to [[Esperance, Western Australia|Esperance]] and north to [[Leonora, Western Australia|Leonora]]; heavy rail lines in the north ([[Pilbara]]) transporting iron ore to port
|-
| Tasmania <br> {{RailGauge|1067mm}} ||colspan=2|
|}

=== New Zealand ===
New Zealand originally had small lengths of lines of {{RailGauge|3ft6in}}, {{RailGauge|impsg}} and {{RailGauge|63in}}, but quickly converted all to {{RailGauge|3ft6in}}, which better suited the sparsely populated and mountainous country.

==Notes==
{{Reflist|group=note}}

==References==
{{Reflist|30em}}

==Bibliography==
* {{ cite book
  | first = L. T. C. |last=Rolt
  | title = Isambard Kingdom Brunel
  | year = 1989
  | orig-year = 1957
  | publisher = Prentice Hall Press
  | isbn = 978-0-582-10744-1
}}
* {{ cite book
  | first = John | last = Wilson
  | title = Break-of-gauge, a social history
  | year = 2024
  | publisher = Sarlines Railway Books
  | isbn = 978-0-6456219-3-8
}}

== See also ==
{{Portal|Trains}}
{{div col|colwidth=30em}}
* [[Erie Gauge War]]
* [[Eurasian Land Bridge]]
* [[Gauntlet track]]
* [[Janes World Railways]] has maps that generally show breaks-of-gauge.
* [[Piggyback (transportation)]]<ref>{{cite web|url=http://www.southaustralianhistory.com.au/fees.htm|title=Flinders Ranges Research Fees}}</ref><ref>{{cite web|url=http://www.southaustralianhistory.com.au/email.htm|title=Flinders Ranges Research Email}}</ref>
* [[Ramsey car-transfer apparatus]]
* [[Track gauge conversion]]
* [[Variable gauge axles]]
** [[INTERGAUGE]] a form of VGA
** [[SUW 2000]] a form of VGA
{{div col end}}

==External links==
*[https://web.archive.org/web/20061205185702/http://jwr.janes.com/public/jwr/index.shtml Jane's World Railways] (hard copy)
*Transport and Telecommunication: [http://www.tsi.lv/Transport&Telecommunication/v71_en/art15.pdf The operation of the gauge changing facility of the new railway line Rail Baltica]{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}, Jonas Jonaitis, Vol.7, No 1, 2006

{{Navbox track gauge}}

{{Use mdy dates|date=January 2016}}

{{DEFAULTSORT:Break Of Gauge}}
[[Category:Track gauges]]

[[es:Cambiador de ancho]]