Premetro

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Trams at Saint-Gilles/Sint-Gillis station with partially low platforms in Brussels. Bruxelles - Brussel - Parvis de Saint-Gilles - Sint-Gillis Voorplein (12038666124).jpg
Trams at Saint-Gilles/Sint-Gillis station with partially low platforms in Brussels.
Low platform section for trams at Duisburg Hauptbahnhof Stadtbahn station. Stadtbahn Duisburg Hauptbahnhof 1905300952.jpg
Low platform section for trams at Duisburg Hauptbahnhof Stadtbahn station.
Low platform station for trams in Vienna during transformation. A third rail and emergency stairs from the future high platform have already been installed. 067L33100380 2er Linie Ustrab, Umbau fur U Bahnbetrieb, Haltestelle Volkstheater, Linie E2, Typ L 543, l3, l3 10.03.1980.jpg
Low platform station for trams in Vienna during transformation. A third rail and emergency stairs from the future high platform have already been installed.

Premetro (sometimes pre-metro) is a type of light rail transit. Here infrastructure is gradually built with the goal to use rapid transit trains in the distant future, but using trams or light rail vehicles preliminary in the meantime. This infrastructure consists of tunnels and/or viaducts, so vehicles have no conflicts with other traffic. To achieve that these rapid trains will be able to use the infrastructure, wider curves and lesser grades need to be designed and built. [1] [2] [3] [4] [5]

Contents

The use of tram vehicles in tunnels originated in the USA in the nineteenth century and was often called "subway surface line" while in the second half of the twentieth century the term "semi-metro" was coined. Only when a semi-metro section is designed for later use of heavy rapid transit, it also falls in the premetro category. [6] During the time when tram vehicles are used, the specific line falls into the light rail category. [7] [8]

History

An early example was the Tremont Street subway (1897) in Boston, today part of the MBTA Green Line. This tunnel was intended solely to reduce streetcar congestion on surface streets, not for later conversion to metro service. [9] However between 1901 and 1908, two out of four tracks were used for rapid tranist service including high platforms. [10] Several early streetcar tunnels, including the Steinway Tunnel and East Boston Tunnel, were later converted to metro operation. However, the small loading gauge, tight curves, and steep grades of the streetcar tunnels required shorter metro cars than otherwise desirable. [9] In 1950 Stockholm effectively used a pre-war tramtunnel for its first rapid transit line. [11]

Second generation

The modern premetro concept Stadtbahn began in 1960s Germany, as rising traffic congestion due to auto ownership led to the construction of new transit systems. Rather than building costly metro lines immediately, some cities built only the downtown tunnels. They could be used by existing tram lines in the short term, with the intention of full metro conversion later - hence "pre-metro". [12] The idea spread to other European countries in the 1970s, especially Belgium, where such systems were explicitly named premetros. [12] Also one segment of Vienna's U2 metro line (Rathaus-Museumsquartier) is an in 1980 converted underground tramway line, which was constructed in 1966.

Examples

See also

Related Research Articles

<span class="mw-page-title-main">Tram</span> Street-running light railcar

A tram is a type of urban rail transit consisting of either individual railcars or self-propelled multiple unit trains that run on tramway tracks on urban public streets; some include segments on segregated right-of-way. The tramlines or tram networks operated as public transport are called tramways or simply trams/streetcars. Due to their close similarities, trams are commonly included in the wider term light rail, which also includes systems separated from other traffic.

<span class="mw-page-title-main">Light rail</span> Form of passenger urban rail transit

Light rail is a form of passenger urban rail transit using rolling stock derived from tram technology while also having some features from heavy rapid transit.

<span class="mw-page-title-main">Tram stop</span> Place designated for a tram to stop so passengers can board or leave

A tram stop, tram station, streetcar stop, or light rail station is a place designated for a tram, streetcar, or light rail vehicle to stop so passengers can board or alight it. Generally, tram stops share most characteristics of bus stops, but because trams operate on rails, they often include railway platforms, especially if stepless entries are provided for accessibility. However, trams may also be used with bus stop type flags and with mid-street pavements as platforms, in street running mode.

<span class="mw-page-title-main">Brussels Metro</span> Public rapid-transit system serving the Brussels-Capital Region, Belgium

The Brussels Metro is a rapid transit system serving a large part of the Brussels-Capital Region of Belgium. It consists of four conventional metro lines and three premetro lines. The metro-grade lines are M1, M2, M5, and M6 with some shared sections, covering a total of 39.9 kilometres (24.8 mi), with 59 metro-only stations. The premetro network consists of three tram lines that partly travel over underground sections that were intended to be eventually converted into metro lines. Underground stations in the premetro network use the same design as metro stations. A few short underground tramway sections exist, so there is a total of 52.0 kilometres (32.3 mi) of underground metro and tram network. There are a total of 69 metro and premetro stations as of 2011.

<span class="mw-page-title-main">Tram-train</span> Tramway routes which share track with main-line railways

A tram-train is a type of light rail vehicle that both meets the standards of a light rail system, and also national mainline standards. Tramcars are adapted to be capable of running on streets like an urban tramway but also be permitted operation alongside mainline trains. This allows services that can utilise both existing urban light rail systems and mainline railway networks and stations. It combines the urban accessibility of a tram or light rail with a mainline train's greater speed in the suburbs.

<span class="mw-page-title-main">Urban rail transit</span> Train service intended for city-dwellers

Urban rail transit is a wide term for various types of local rail systems providing passenger service within and around urban or suburban areas. The set of urban rail systems can be roughly subdivided into the following categories, which sometimes overlap because some systems or lines have aspects of multiple types.

Various terms are used for passenger railway lines and equipment; the usage of these terms differs substantially between areas:

<span class="mw-page-title-main">Trams in Brussels</span> Overview of the tram system of Brussels, Belgium

The Brussels tramway network is a tram system serving a large part of the Brussels-Capital Region of Belgium. It is the 16th largest tram system in the world by route length, in 2017 providing 149.1 million journeys over routes 140.6 km (87.4 mi) in length. In 2018, it consisted of 18 tram lines. Brussels trams are operated by STIB/MIVB, the local public transport company.

<i>Stadtbahn</i> Type of railway network

Stadtbahn is a German word referring to various types of urban rail transport. One type of transport originated in the 19th century, firstly in Berlin and followed by Vienna, where rail routes were created that could be used independently from other traffic.

<span class="mw-page-title-main">Schuman railway station</span> Railway station in Brussels, Belgium

Brussels-Schuman railway station is a railway station in the City of Brussels, Belgium, serving the European Quarter. The station received its name from the aboveground Robert Schuman Roundabout, itself named after Robert Schuman, one of the founding fathers of the European Union, the Council of Europe and NATO.

<span class="mw-page-title-main">Light rail in North America</span> Mode of public transit

Light rail is a commonly used mode of public transit in North America. The term light rail was coined in 1972 by the Urban Mass Transportation Administration to describe new streetcar transformations which were taking place in Europe and the United States. The Germans used the term Stadtbahn, which is the predecessor to North American light rail, to describe the concept, and many in UMTA wanted to adopt the direct translation, which is city rail. However, in its reports, UMTA finally adopted the term light rail instead.

<span class="mw-page-title-main">History of rapid transit</span> Overview of the global rapid transition

The history of rapid transit began in London with the opening of the Metropolitan Railway, which is now part of the London Underground, in 1863. By World War I, electric underground railways were being used in Athens, Berlin, Boston, Buenos Aires, Budapest, Glasgow, Hamburg, Istanbul, Liverpool, New York City, Paris, and Philadelphia.

<span class="mw-page-title-main">History of tram and light rail transit systems by country</span>

Although tram and Heritage streetcar systems date to the late 19th and early 20th centuries, many old systems were closed during the mid-20th century because of the advent of automobile travel. This was especially the case in North America, but postwar reductions and shutdowns also occurred on British, French and other Western European urban rail networks. However, traditional tramway systems survived, and eventually even began to thrive from the late 20th century onward, some eventually operating as much as when they were first built over a century ago. Their numbers have been augmented by modern tramway or light rail systems in cities which had discarded this form of transport.

<span class="mw-page-title-main">Rapid transit</span> High-capacity public transport

Rapid transit or mass rapid transit (MRT), commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separated rapid transit line below ground surface through a tunnel can be regionally called a subway, tube, or underground. They are sometimes grade-separated on elevated railways, in which case some are referred to as el trains – short for "elevated" – or skytrains. Rapid transit systems are railways, usually electric, that unlike buses or trams operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles.

<span class="mw-page-title-main">Rapid transit in Germany</span> Overview of the rapid transit system in Germany

Rapid transit in Germany consists of four U-Bahn systems and 14 S-Bahn systems. The U-Bahn, commonly understood to stand for Untergrundbahn, are conventional rapid transit systems that run mostly underground, while the S-Bahn or Stadtschnellbahn are commuter rail services, that may run underground in the city center and have metro-like characteristics in Munich, Hamburg and Berlin which they only have to a lesser extent in other cities. There are also over a dozen semi-metro or Stadtbahn systems that are rapid transit in the city center and light rail outside.

<span class="mw-page-title-main">Essen Stadtbahn</span> German light rail network

The Essen Stadtbahn is a 19.6-kilometer (12.2 mi) light rail (Stadtbahn) network in Essen and the two neighbouring towns of Mülheim an der Ruhr and Gelsenkirchen in the German state of North Rhine Westphalia. It forms part of the Rhine-Ruhr Stadtbahn.

Light rail is a commonly used mode of public transit in South America. The term light rail was coined in 1972 by the Urban Mass Transportation Administration to describe new streetcar transformations which were taking place in Europe and the United States. The Germans used the term Stadtbahn, which is the predecessor to North American light rail, to describe the concept, and many in UMTA wanted to adopt the direct translation, which is city rail. However, in its reports UMTA finally adopted the term light rail instead.

<span class="mw-page-title-main">Semi-metro</span> Subclass of light rail using rapid transit infrastructure.

Semi-metro is a form of public rail transport in which trams run partly on a conflict-free track, by using tunnels and viaducts. These stretches of track are designed to function like a regular metro or rapid transit line. Semi-metro lines run with tram cars because they are usually developed from an existing tram network.

References

  1. Transit Capacity and Quality of Service Manual. Transportation Research Board. 2013. ISBN   978-0-309-28344-1. pre-metro — a light rail transit system designed with provisions for easy conversion to heavy rail (rail rapid transit).
  2. De Leuw, Cather & Company (1976). Light Rail Transit: A State of the Art Review, Executive Summary. p. 47. Retrieved 30 August 2023. This step-by-step planning approach to building rail rapid transit is known as pre-metro, implying the intention to ultimately construct a fully grade separated route to be used by rail rapid transit or metro trains.
  3. Jenkin, P. (1988). Urban Railways and the Civil Engineer. Thomas Telford. ISBN   978-0-7277-1337-7 . Retrieved 9 August 2024. Pre-Metro is an extreme case of light rail, on segregated right of way, and designed to upgrading to metro when passenger demand increases sufficiently.
  4. Mattila, Matti (5 August 2012). Wizzit Magazine 3/2011. Annorlunda Mediatuotanto Oy. p. 19. ISBN   978-1-4478-2842-6 . Retrieved 9 August 2024. Premetros also allow a gradual upgrade of existing tramways to rapid transit, thus spreading the investments costs over time.
  5. John Hoyle (16 May 1975). "Letters to the editor -- The tram is the answer". Sydney Morning Herald . Retrieved 13 January 2014. Cities such as Frankfurt and Cologne in West Germany have further developed their tramway system by introducing a concept known as "premetro." In this system trams or light rail vehicles make extensive use of tunnels, reserve track and by utilizing folding steps these vehicles can operate through high or low stopping places.
  6. "PREMETRO [1 record]". TERMIUM Plus®. 8 October 2009. Retrieved 23 July 2024.
  7. Transportation Research Board National Research Council (1989). Urban Public Transportation Glossary . Retrieved 16 February 2023. pre-metro: a light rail transit system designed with provisions for easy conversion to rail rapid transit
  8. Vuchic, Vukan R. (2007). Urban transit systems and technology. Hoboken, N.J: J. Wiley & Sons. p. 580. doi:10.1002/9780470168066.fmatter. ISBN   9780471758235 . Retrieved 7 October 2023. PREMETRO—An LRT system designed with provisions for easy conversion into RRT (metro).
  9. 1 2 Cudahy, Brian J. (1972). Change at Park Street Under . Stephen Greene Press. pp.  10-11, 31-33. ISBN   0828901732. LCCN   72081531.
  10. "Boston Elevated Railway Company, Main Line Elevated Structure (HAER)". www.nycsubway.org. Retrieved 7 August 2024. the outer tracks of the Tremont Street Tunnel which was adapted to elevated train use in 1901 by the construction of higher platforms
  11. Geoffrey, Skelsey (2018). Brussels Metro to Grow As Pre-metro Shrinks. London Underground Railway Society. p. 3.
  12. 1 2 Ian Yearsley (21 December 1972). "Trams are coming back". New Scientist . Reed Business Information Ltd. Retrieved 14 January 2014. But instead of building the entire expensive systems immediately, the Germans hit on the idea of building only the city centre tunnels at first. Intended in the long run to be extended to full undergrounds, in the short term they could be used by trams which would continue to run on the surface outside city centres. The idea spread to other European countries, especially Belgium, where it became known as pre-metro. Today Brussels, Frankfurt, Stuttgart and many other cities are filling their central business districts with construction sites to move the trains underground.
  13. "Antwerpen Tram & Premetro". UrbanRail.net. 2013. Retrieved 22 January 2014. Antwerpen rail network is a typical premetro network.
  14. Geoffroy Fabre (19 March 2014). "Une station fantôme au secours du futur Métro Nord de la STIB". RTBF . Retrieved 9 May 2014.
  15. "Charleroi Premetro". UrbanRail.net. 2013. Retrieved 22 January 2014. The Charleroi Metro is a typical prémétro network, i.e. trams that run underground in the city centre and on viaducts or separate right-of-way through outer parts (similar to German Stadtbahn systems).