Narrow-gauge railways are railways or railroads where the distance between the two parallel rails constituting the railway track (the track gauge) is less than the of standard gauge railways. In practice, most presently existing narrow gauge railways have gauges of or less. The rationale for the use of a narrower gauge is that a railway using such a gauge can be substantially cheaper to build, equip, and operate than one employing standard gauge. This allows railways to be built in mountainous regions, and other places where heavy rail trains would need tunnels or bridges. Narrow gauge railways also have specialized use in mines and other environments where their smaller size is an advantage. On the other hand, standard gauge railways have a greater haulage capacity and allow greater train speeds than narrow gauge systems.
Historically, many narrow gauge railways were built as part of specific industrial enterprises and were primarily industrial railways rather than general carriers. Some common uses for these industrial narrow gauge railways were mining, logging, construction, tunnelling, quarrying, and the conveying of agricultural products. Extensive networks were constructed in many parts of the world for logging or for transporting agricultural products. Significant sugarcane railways still operate in places such as Cuba, Fiji, Java, and Queensland in Australia, while narrow gauge railway equipment remains in common use for the construction of tunnels. The other significant reason for narrow gauge railways to be constructed was to take advantage of reduced construction costs in mountainous or difficult terrain, hence the national railway systems of countries such as Japan and New Zealand are primarily or solely narrow gauge. Non-industrial narrow gauge mountain railways are or were also common in the Rocky Mountains of Canada and the USA, in Mexico, in Switzerland, in the former Yugoslavia, in Greece, in India, and in Costa Rica. Another country with a notable national railway built to narrow gauge is South Africa.
There were and are also many narrow gauge street tramways, particularly in Europe, where the need for a narrow body width meant that a track gauge of a metre was necessary (trams are usually wider than the tracks they run over). A notable example of this is the tramway system of Linz, Austria.
Extensive narrow gauge railway systems served the front-line trenches of both sides in World War I.
For temporary railroads which will be removed after a short-term need, such as for construction, the logging industry and to a lesser degree the mining industry, a narrow gauge railroad is substantially cheaper. However, this use of railroads is almost extinct thanks to the capabilities of modern trucks.
In many countries, due to their lower construction costs, narrow gauge railroads were built as "feeder" or "Branch" lines to feed traffic to more important standard gauge railroads. The choice was often seen as not between a narrow gauge railroad and a standard, but rather between some kind of railroad and none at all.
In some countries, especially countries with a lot of hilly or mountainous terrain, extensive systems of narrow gauge railroads were built, especially in remote areas of limited economic development, where there would not be enough traffic to justify the cost of building full standard gauge railroads.
The most fundamental problem is that most narrow gauge railroads are 'islands' - they cannot interchange equipment with the standard gauge railroads they link with. Therefore, a narrow gauge common carrier in such a situation has a built-in and inevitable cost when it comes to receiving traffic, whether people or more importantly freight, from outside of its own system, and sending to destinations outside its own system. The cost of transshipment is a substantial drain on the finances of a small railroad, and transshipment is almost always a task involving much expensive and time-consuming manual labor. For certain bulk commodities transshipment can be mechanised, such as for coal, ore, gravel and the like.
The problem of interchangeability is less serious when a large system of narrow-gauge lines exist which carry considerable amounts of internally self-contained traffic, such as in northern Spain, South Africa and Tasmania. But most narrow-gauge lines were constructed as stand alone "feeders" entirely dependent upon transshipment to a larger main-line network.
When there was no competitor to the narrow gauge railroad this was less of a problem, but it made narrow gauge lines very vulnerable to truck competition. The railroads' trump card has always been economy of scale and distance, and the transshipment requirement removed that. Trucks had no worse a transshipment problem and were more flexible in operation.
Other problems with narrow gauge railroads came down to that they lacked room to grow - their cheap construction was bought at the price of only being engineered for their initial traffic demands. While a standard-gauge railroad could much more easily be upgraded to handle heavier, faster traffic, most narrow-gauge railroads were impossible to improve. Speeds could not increase, loads could not increase, and traffic density could not increase very much.
One can build a narrow-gauge railroad to be able to handle such increased speed and loading, but at the price of removing most of the narrow gauge's cost advantage over standard gauge.
Because of the reduced stabillity of narrower tracks, narrow gauge trains are not able to run at the same high speeds as those networks with broader gauges. However in Japan and Queensland, Australia, recent permanent way improvements have allowed trains on metre-gauge or 1067 mm gauge tracks to run at a reasonable speed of 160 km/h (100 mph) and higher. Queensland Rail's tilt train is presently the fastest train in Australia, despite the gauge it runs on. Standard gauge trains, however, can run at speeds of up to 320 km/h (200 mph); this is most evident in the case of the Japanese Shinkansen, a network of standard gauge lines built solely for high speed rail in a country where narrow gauge is the predominant standard.
Heavy duty narrow gauge lines and light duty standard gauge lines show that gauge is not the pivotal factor affecting the cost of construction. Thus a single gauge of about the Stephenson gauge could have done the job for all tasks done by 3 to 7 foot (1 to 2 m) gauges, albeit with a mini-gauge such as 2 feet (610 mm) for a range of very light weight tasks from cane tramways to mountain lines to military lines to construction to mining railways.
The real parameters that affect the capacity of a line are things like axle loads and loading gauge. Axle loads can be increased incrementally by increasing the weight of the rails, etc, while loading gauge can be difficult to increase if there are awkward bridges and tunnels to widen or deepen. If carriages and engines are made smaller, then tunnels can also be made smaller, saving money, but restricting loads.
The next natural "grouping" of narrow-gauge railroads covers the spread from just below 2 ft gauge (610 mm) to about 760 mm (2 ft 6 inches). These lightweight lines can be built at a substantial cost saving over even the larger narrow gauge lines, but are very restricted in carrying capacity. The vast majority of these have been built in heavily mountainous areas and most were to carry mineral traffic from mines to ports or standard-gauge railroads. Most were industrial lines rather than common carriers, with the exception of the extensive 760 mm lines built in the former Austro-Hungarian Empire.
Gauges below that are rarely used, most commonly in such restricted environments as underground mine railways. The other use of such lines is for the tourist industry; these are called miniature railways if they attempt to reproduce full-size railway equipment in miniature.
see also Narrow gauges in the Czech Republic
The French National Railways used to run a considerable number of lines, a few of which still operate mostly in tourist areas, such as the St Gervais-Vallorcine (Alps) and the "Train Jaune" (yellow train) in the Pyrenees. The original French scheme was that every sous-prefecture should be rail connected. Extensive near gauge lines were also built for the sugar-beet industry in the north often using ex-military equipment after the First World War. Decauville was a famous French manufacturer of industrial narrow-gauge railway equipment and equipped one of the most extensive regional narrow gauge railway, the Chemins de Fer du Calvados.
see also List of narrow gauges in Saxony
Apart from small heritage venues, the Irish narrow gauge today only survives in the bogs of the Midlands as part of Bord na Móna's extensive industrial network for transporting harvested peat to distribution centres or power plants.
See also: History of rail transport in Ireland
In Sicily, too, some narrow-gauge lines (950 mm) operated, the most important of which was the Castelvetrano-Porto Empedocle. All those lines are closed.
Between Naples and Sorrento, around the base of Mt. Vesuvius, the narrow-gauge (950 mm) Circumvesuviana railway operates frequent services on narrow gauge tracks.
The only commercial narrow gauge railway left is the Roslagsbanan suburban railway in north-eastern Stockholm (891 mm gauge). The longest other remaining narrow gauge railway is the 891 mm line between Åseda, Hultsfred and Västervik. 70 km between Hultsfred and Västervik is served by tourist trains in the summer, including 4 km of dual gauge track).
more Rail transport in Switzerland
Only a few of these lines survive as a commercial common carriers. The great majority of the remaining narrow gauge lines operate purely as tourist attractions, and a number of new narrow gauge tourist lines have been built in recent years. The sole passenger-carrying exception is the Glasgow Subway, an underground metro line that operates on a four foot gauge. The Talyllyn Railway holds the distinction of being the first railway in the world of any gauge to be rescued and run entirely by volunteers. In addition a few private industrial narrow gauge railways remain, mainly serving coal and peat extraction.
Amongst the most well-known narrow gauge lines in Britain are the Ffestiniog - now the oldest independent railway company in the world - the Vale of Rheidol, and the Welshpool & Llanfair in Wales, and the Lynton & Barnstaple in England. Unique amongst British railways is the rack-and-pinion Snowdon Mountain Railway which climbs to just below the summit of Wales' highest peak. See also the List of British heritage and private railways.
Both main railways in the Isle of Man (part of the British Isles though not technically in the United Kingdom) are of 3 feet (914 mm) gauge. The Isle of Man Steam Railway to the southwest is operated largely as a tourist attraction but the Manx Electric Railway to the northeast is a commercially operated railway system though its operation is closer to that of a tramway than a railway and includes street running sections at each end. Another railway (operated as part of the Manx Electric Railway), the Snaefell Mountain Railway, climbs the island's main peak and has a gauge of 3 ft 6 in (1067 mm), the extra width allowing the laying (on its side) of a central double headed rail. This rail, the Fell rail, permits a braking system operating directly on the rail.
Various mining and industrial operations in eastern, central and western Canada have also operated narrow gauge railways. The only narrow gauge system still in operation in the country is the 3 ft 0 in gauge White Pass and Yukon Route. WPYR was built as a common carrier but closed in 1982 only to reopen in 1988 to haul tourists from cruise ships docking at Skagway, Alaska through White Pass on the International Boundary to Bennett, British Columbia (and return). The remainder of the line is in place but not presently operational to Whitehorse, Yukon.
In the Catskill Mountains of southern New York, the Stony Clove and Catskill Mountain Railway was constructed in 1882, along with another one, called the Kaaterskill Railway, being chartered in 1884. The SC&CM started at Phoenicia, New York, and went to Hunter, New York, with the KRR starting somewhere outside of Hunter, and going to Kaaterskill, New York. These railroads were taken over by the Ulster and Delaware Railroad in 1892, and converted to standard gauge throughout the years of 1898 and 1899. These new branches were taken over by the New York Central in 1932, along with the rest of the Ulster and Delaware, and sold for scrap in 1940.
The last surviving commercial common carrier narrow-gauge railroad in the United States was the White Pass and Yukon Route connecting Skagway, Alaska and Whitehorse, Yukon Territory; this closed down in 1982 as a result of the construction of a parallelling highway through the White Pass and the collapse of markets for its primary freight, lead and zinc ores. The line has since been partially reopened as a purely tourist railway. There is but one narrow gauge railroad still in commercial operation in the United States, the US Gypsum operation in Plaster City, California which uses a number of Alco locomotives obtained from the White Pass after its 1982 closure.
The famous San Francisco cable car system has a gauge of 3 ft 6 in (1067 mm).
In 1866, The East Tennessee and Western North Carolina Railroad was granted a charter to construct a narrow gauge railroad between Johnson City, Tennessee and Cranberry, North Carolina. By 1919, it had extended service to Boone, North Carolina. It continued in service until 1950. In 1957, the railroad was revived as a tourist attraction under the common name, Tweetsie Railroad. It currently runs a three mile route near Blowing Rock, North Carolina. The steam engine is a Baldwin type 10-26D #332 (4-6-0), built in 1917.
The last remaining 3 ft (914 mm) gauge line east of the Mississippi River is the East Broad Top Railroad in Central Pennsylvania. Running from the 1800s until 1956, it supplied coal to brick kilns and general freight to the towns it passed through, connecting to the Pennsylvania Railroad at Mount Union, Pennsylvania. Purchased for scrap by the Kovalchick Corporation when it was shut down, it sat for four years until it was partly resurrected by townspeople of Orbisonia in 1960. Still owned by the Kovalchick family, trains operate over 5 miles of the original 32-mile line. As of the end of 2004, only one of six Mikado-type (2-8-2) locomotives is currently operable: number 14. Locomotive 15 is being rebuilt to comply with current FRA requirements. In addition to various freight and passenger cars, the railroad also has a gas-electric railcar, the M-1. The car operates only on special occasions, such as the Fall Spectacular, held on Columbus Day weekend every year. The rest of the railroad is intact, but overgrown with 48 years worth of plant growth.
There were extensive two foot (610 mm) gauge lines in the Maine forests early in the 20th century. Although essentially for the transport of timber (or in one case, slate - the last line to be closed), the Maine lines did have some passenger services. Some cars and trains from these lines are now on display at the Maine Narrow Gauge Railroad and Museum in Portland, Maine after having spent years on the Edaville Railroad on Cape Cod in Massachusetts.
Many narrow gauge lines were private carriers serving particular industries. One major industry that made extensive use of 3 ft (914 mm) gauge railroads was the timber extraction industries, especially in the West. Although most of these lines closed by the 1950s, one notable later survivor was West Side Lumber Company which continued using 3 ft (914 mm) gauge geared steam locomotives until 1968. Much of the equipment from the Westside found its ways to tourist lines, including the Roaring Camp and Big Trees Narrow-Gauge Railroad and Yosemite Mountain Sugar Pine Railroad in California and the Midwest Central Railroad in Iowa.
The Houston East and West Texas Railway built the last narrow gauge main line connecting major mainland U.S. cities that is still in operation today, albeit in standard gauge form. On January 26, 1886, the HE&WT completed a 3 ft (914 mm) gauge line from Houston, Texas by way of Lufkin and Nacogdoches to the Louisiana state line near the Sabine River. It connected to the affiliated Shreveport and Houston Railway Company, completing a 3 ft (914 mm) gauge main line from Houston to Shreveport, Louisiana. Unfortunately, all other railroads in the vicinity used standard gauge by the time the HE&WT was completed, hampering the efficient transshipment of cargo, and on July 29, 1894, the entire line was converted to standard gauge. The Southern Pacific Railroad gained control of the HE&WT in 1899. As of 2006, the former HE&WT main line was still in operation by the Union Pacific Railroad, the Southern Pacific's successor, and the line is still known as the "Rabbit Line" in honor of the popular nickname of the HE&WT.
In the 1990s, India concluded that cities on the metre-gauge network have a second-rate train service, and is now converting most of the metre-gauge network to broad gauge as Project Unigauge. In other words, the advantages of uniformity and interoperability were judged to outweigh any other possible benefits arising from the use of diverse gauges.
In 1999 the Darjeeling Himalayan Railway (sometimes called the Darjeeling "Toy Train") was officially designated as a UNESCO World Heritage Site. It is a 2 ft (610 mm) gauge narrow-gauge railway that runs from Siliguri to Darjeeling in the state of West Bengal in India.
The railway was built between 1879 and 1881 and is about 86 km long. It rises from the plains of Siliguri at about 100 m elevation to over 2200 m at Ghum in the foothills of the Himalayas; this is the second highest railway station that can be reached by steam train in the world. The line then descends again to Darjeeling. The railway travels through spectacular mountain scenery and uses several unusual civil engineering techniques to gain the necessary height including several switchbacks, and spirals including the famous double loop at Agony Point. The line was inspired by the earlier success of the 2 ft. gauge Ffestiniog Railway in North Wales.
Until recently all trains on the railway were powered by steam locomotives; however in 2001 two modern diesel engines were built for the line and now most trains are diesel hauled.
In Sabah, the North Borneo Railway ("Keretapi Negeri Sabah") runs a metre-gauge line from Kota Kinabalu up to Tenom in the Crocker Ranges, via Beaufort.
A 2 ft 6 in (762 mm) narrow-gauge mountain railway stretches 72 km and connects the city of Chiayi to the mountain resort of Alishan. The line serves mainly as a tourist attraction and offers breathtaking mountain views.
Because Africa is fragmented politically, railways built by governments tend not to link up with each other, each country's lines connecting its outlands with its own port. Incompatible gauges are therefore not obvious. For example, a link from Nigeria to Cameroon would join 1067 mm to 1000 mm.
Much work has been done to rectify the gauge chaos, but there is still much to do. By and large any uniform gauge would have done the job satisfactorily.
In the beginning, in 1865, the brief given to Queensland Railways was to build a semi-mountainous line in very sparsely populated territory, and it chose light rails, sharp curves, a small loading-gauge, light engines and rolling stock, 32 km/h speeds to make a limited budget go a long way. A clever salesman convinced the Queensland government that a narrow gauge would save money, and do the job for a hundred years. Queensland Railways was the first mainline narrow-gauge railway in the world. Its tracks would eventually extend to around 9000 km.
In the intervening century, the rails have been replaced with heavier rails, there are now concrete sleepers and colour light signals, sharp curves have been straightened, tunnels have been opened out. The one thing that hasn't changed is the narrow gauge, even though the rest of the country is converting its main lines to the standard gauge of 1435 mm.
Queensland Rail also operates the iconic QR Tilt Train, with a maximum speed of 165 km/h.
Dual gauge has been added to give access from the interstate standard gauge line to the Port of Brisbane.
Dual gauge is also proposed to convert the standard gauge interstate line for use by narrow gauge commuter trains.
To avoid speed restriction where some cane trams cross the main line, several of these crossings have been converted to drawbridges.
In the 1920s several narrow-gauge lines were converted to broad gauge.
The South Eastern narrow-gauge lines were converted to broad gauge in the 1950s, with steel sleepers able to be converted to standard gauge at a later date if required.
Three gauge yards (broad, standard and narrow) have existed at three stations at various times — Port Pirie (1938), Gladstone (1970) and Peterborough (1970) — though none survive today.
During the conversion of the original narrow-gauge Port Augusta to Marree line, whole narrow-gauge trains were loaded onto rails mounted on standard-gauge trains, to avoid transhipment and the steep gradients on the old narrow-gauge route.
The privately owned iron ore mines at Iron Knob and Iron Baron are connected to the steel works at Whyalla by an isolated narrow gauge 3 ft 6 in (1067 mm) line through desert country. Legally, it is a tramway, not a railway. These 2000-tonne "trams" must be the heaviest "trams" ever.
In the capital of Perth, there was the only narrow gauge tramway network (of any considerable extent) on mainland Australia. The final portion was closed in 1958.
Because there are no tunnels or narrow bridges on the old-narrow gauge line, the line received a lot of second-hand standard-gauge rolling stock, this rolling stock being noticeably larger than the original narrow gauge waggons and carriages.
The long serving Engineer of the NSW railways John Whitton resisted all attempts to introduce other gauges, based on experience of the break-of-gauge problem in England. He also resisted horse-drawn operation. Later engineers introduced "Pioneer" construction, whereby money was saved by lighter weight construction, and absence of fencing.
Meanwhile, on the main lines radiating from the state capital Sydney, ever increasing traffic required heavier engines, and therefore heavier track and stronger bridges. Fortunately, track can be upgraded one length of rail at a time, unlike gauge conversion which is generally a daunting all-or-nothing task.
In NSW in 2004, there are now about 10 classes of track from 1 to 5. All engines and rolling stock can operate on the heaviest class 1 track, while only certain light locomotives and rolling stock can operate at low speeds on class 5 track. The track classes are a kind of break-of-gauge that permits through running with careful attention to detail.
The narrow-gauge line now in use as the Puffing Billy Tourist Railway originally ran from Upper Ferntree Gully station in the Melbourne suburbs to Gembrook station in the Dandenong Ranges to the east of Melbourne. The first section of this line, as far as Belgrave station, has been converted to become part of Melbourne's broad-gauge electrified suburban network. The remainder of the line is now better known as the Puffing Billy Railway, which is maintained and operated by volunteers as a steam-hauled preserved railway and tourist attraction.
The last of the four narrow-gauge railways to open, the Moe to Walhalla line in Gippsland which was opened in 1910 and then closed in 1954, has been partially reopened from Thomson Station into Walhalla in recent years as the Walhalla Goldfields Railway. Because the Puffing Billy Railway has nearly all of the remaining locomotives and rolling stock known to exist from the four NG lines, this line has had to modify rolling stock from elsewhere or build new, but non-original style, rolling stock.
Kalgoorlie and Port Augusta are both narrow-gauge railheads, albeit with different coupling and braking systems. A narrow-gauge Transcontinental line might therefore have been the obvious choice, but an earlier conference of railway commissioners had decided that interstate lines were to use the Stephenson gauge of 1435 mm. So the Transcontinental line was built as an isolated standard-gauge line, its isolation lasting from 1917 to 1970. During wartime, when traffic was very heavy, the breaks of gauge at either end of the Transcontinental line meant that it could not easily draw on the resources of the systems at either end.
Rail gauge | Narrow gauge railways
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