This article needs additional citations for verification .(June 2019) |
This article possibly contains original research .(September 2024) |
The ADtranz low floor tram was introduced in the 1990s as the world's first tram with a completely low floor design.[ citation needed ] This tram was developed by MAN for the Bremen urban transport system. The prototype, tram number 3801, was first publicly introduced on 9 February 1990. From 1991 to 1993, it was being tested in many European cities. Ten German cities have purchased this type. Adtranz took over the rail division of MAN in 1990.
The naming scheme is GTxN/M/S/K from German Gelenk-Triebwagen (articulated propelled railcar) with x axles for a specific gauge (Normalspur - standard gauge, Meterspur - meter gauge, Schmalspur - narrow gauge, Kapspur - cape gauge). Delivered models include the standard-gauge version that was named GT6N or GT8N and the metre-gauge version that was called GT6M.
Adtranz low floor trams come in lengths of three or four modules, all of which are approximately the same length. Under each module lies a bogie; the low floor, however, constrains the bogie's movement. Two of the axles are mechanically linked to the bogie truck by means of a universal joint. Characteristic of this tram is its ability to follow curves, which requires a special track layout. This occurs when the first or last module drives through a curve and drags the other two modules (which are on the straight) after it.
The company Hansa Waggonbau in Bremen had been among the first to introduce the concept of articulated railcars which had been delivered to customers with the GT4 model since 1959 ( example ) The fading interest in tram operation in the 1970s however led to a bankruptcy of the company in 1975. Renewed interest in the concept sprang up in the late 1980s with Bremen and Munich to look for modernized versions of the GT type series. This included the wish for a low floor variant and all rail cars to supply traction. MAN took over the task to create a test model (number 561) in 1985 which consisted of 3 units (instead of the 2 units of the GT4). The first model to be delivered (GT6N) was a three part electrical multiple unit (EMU) as well.
Tram operation includes:
On the small tramnet in the Swedish city Norrköping there have been operating four second-hand Adtranz-tram services since the end of the millennium. The selection of stock consists of the prototype "Bremen" (tram 3801) and three units from Munich.
On 20 October 1992, the framework conditions for the procurement of 120 trams were adopted. The first car with the number 1001 was delivered to the Berliner Verkehrsbetriebe (BVG) on 23 August 1994. As problems were encountered in the first passenger cars, the next scheduled deployment was not until 14 November 1994. The first series included 29 trams; The second series consisted of 41 trams. The third series consisted of 60 trams. The fourth series comprises 30 trams. The last unit had been delivered on the 2nd of April 2003. The last series had the following changes compared to the previous deliveries:
In February 2004 the tram Norrköping (Sweden) made the offer for 9 million euros for five units, two of which were of type GT6N and three of type GT6N-ZR. But Berlin rejected the sale.
The response on the Adtranz's second generation trams was not successful on the market. Only Munich and Nuremberg ordered this type. Aside from being updated with the latest technology, it also featured a larger distance between the axles (2,000 mm instead of 1,850 mm) so that the leg space on top of the bogies could be increased. Another difference is, that where the previous generation had technically been a false bidirectional unit, in that it technically consisted of two front lead for each end respectively, it is now a true singular bidirectional multiple-unit. In the middle, the articulation has been lengthened and redesigned, so that the movements of the front and rear sets of modules couldn't influence each other. Because of this, any notable "snaking" only occurs whilst going in or out of curves.
Tram operation includes:
When Bombardier Transportation bought Adtranz, it ceased production of the GTx-trams; however, the concept of articulated railcars for low floor trams was carried forward to its Incentro model, which was eventually replaced by Bombardier's standardized Flexity family of vehicles. Of these, the Flexity Berlin was specially designed with a layout similar to the Incentro and GTx-series and can be considered to be among its immediate successors. These trams entered revenue service in 2011.
Competing manufacturer Siemens Transportation Systems had been offering the Combino models with articulated railcars until some Combino construction flaws were observed. The new Avenio family of tram models features a double articulation joint similar to the second generation of ADtranz low floor trams. These have already been sold to Budapest and Almada (Portugal).
Similar trams are the Alstom Citadis, AnsaldoBreda Sirio and CAF Urbos, among others.
The Siemens Combino is a low-floor tram produced by Siemens Mobility. The first prototype was produced in 1996 at the Duewag works in Düsseldorf; the trams are now made in Krefeld-Uerdingen.
The Siemens Avenio is a low floor tram family produced by Siemens Mobility, a subsidiary of the German conglomerate Siemens. It is the successor to the Combino family. The first generation was sold as the Combino Supra, Combino MkII, or Combino Plus. With the introduction of the second generation in 2009 the Combino brand was dropped and Siemens have referred to Combino Plus trams in Almada (Portugal) and Budapest (Hungary) as part of the Avenio range.
A low-floor tram is a tram that has no stairsteps between one or more entrances and part or all of the passenger cabin. The low-floor design improves the accessibility of the tram for the public, and also may provide larger windows and more airspace.
The Bombardier Flexity Classic is a model of light-rail tram manufactured by Bombardier Transportation. Although it is marketed as the most traditionally designed member of the Flexity family, it is still a modern bi-directional articulated tram with a low-floor section allowing good accessibility, especially to passengers in wheelchairs. Flexity Classic trams run on 1,435 mmstandard gauge in Australia, 1,000 mmmetre gauge in Essen, 1,450 mm in Dresden, and 1,458 mm in Leipzig.
The Socimi Eurotram (later sold as the Bombardier Flexity Outlook (E)) was an electric tramcar designed for the tram system of Compagnie de Transports Strasbourgeois (CTS). Initially produced by Socimi, after the company became bankrupt Eurotrams were manufactured first by ABB Group's transportation division, then by Adtranz and finally by Bombardier Transportation, who marketed the tram as part of their Flexity Outlook range.
The Bombardier Cobra is an articulated, low-floor tram operated by Verkehrsbetriebe Zürich (VBZ) of Zürich and manufactured by Bombardier Transportation. The Cobra was originally designed by a consortium consisting of the ABB Group, Pininfarina, the Schindler Group and Schweizerische Industrie Gesellschaft (SIG), who built several Cobra prototypes; however, all production Cobras have been manufactured by Bombardier.
Jacobs bogies are a type of rail vehicle bogie commonly found on articulated railcars and tramway vehicles.
The Stadler GTW is an articulated railcar for local transport made by Stadler Rail of Switzerland. GTW stands for Gelenktriebwagen.
Germany has an extensive number of tramway networks. Some of these networks have been upgraded to light rail standards, called Stadtbahn in German. Straßenbahn and Stadtbahn schemes are usually operated on the legal foundation of the BOStrab, the Tramways Act of Germany.
The Bombardier Incentro is a model of tram manufactured initially by Adtranz and later by Bombardier Transportation. It is a five-section, low-floor articulated tram, built for bi-directional operation and capable of speeds up to 80 km/h. Incentro trams are used on the Nantes tramway and fifteen of the AT6/5 variants are used on the Nottingham Express Transit.
The Stadler Variobahn is a German-designed model of articulated low-floor tram and light rail vehicle. Since its introduction in 1993, the Variobahn has been manufactured variously by ABB, Adtranz, Bombardier Transportation, and since 2001 by Stadler Rail. As of 2009, 254 trams have been ordered, with an additional 110 on option. A unit costs about €2.5 million.
SL79 is a class of 40 articulated trams operated by the Oslo Tramway of Norway. The trams were a variation of the Duewag trams that had been developed by the German manufacturer since the 1950s. The six-axle vehicles are unidirectional with four doors on the right side. The trams can seat 77 passengers three and four abreast, with an additional 91 people able to stand. Power output is 434 kilowatts (582 hp), provided by two motors on the two end bogies, that supplement a central unpowered Jacobs bogie located under the articulation. The trams are 23.0 metres (75.5 ft) long and 2.5 metres wide. They are capable of 80 kilometres per hour (50 mph) and have standard gauge.
The Munich tramway is the tramway network for the city of Munich in Germany. Today it is operated by the municipally owned Münchner Verkehrsgesellschaft and is known officially and colloquially as the Tram. Previous operators have included Société Anonyme des Tramways de Munich, the Münchner Trambahn-Aktiengesellschaft, the Städtische Straßenbahnen and the Straßenbahn München.
The Zagreb tram network, run by the Zagrebački električni tramvaj (ZET), consists of 15 day and 4 night lines in Zagreb, Croatia. Trams operate on 116.3 kilometres (72.3 mi) of metre gauge route. During the day every line runs on average every 5–10 minutes, but almost every station serves at least two routes. Nighttime lines have exact timetables averaging at about every 40 minutes. The first horsecar tram line was opened in 1891, and the first electric tram ran in 1910. Zagreb's tram system transported 204 million passengers in 2008.
The Bremish GT4 is a GT4 type tramcar that was built in two main versions from 1959 to the 1980s.
Tatra KT4 is the name of a four-axle type articulated tramcar developed by the Czech firm ČKD Tatra. The first pre-production vehicles entered service in Potsdam in 1975, with the first production vehicles in 1977. A total of 1,747 units were built, with initial deliveries to East Germany (DDR) and later to the USSR and SFR Yugoslavia. KT4 variants were built for both standard gauge and metre gauge tramways. Production of the KT4 tramcar was halted in 1991 due to worldwide economic and political changes at the time. Production was briefly resumed in 1997 to construct the last 20 units for Belgrade, Serbia.
The Green Mover Max was the first 100% low-floor articulated Light Rail Vehicle (LRV) to be built entirely in Japan. It was developed jointly by Kinki Sharyo, Mitsubishi Heavy Industries, and Toyo Denki, and introduced first in Hiroshima by the Hiroshima Electric Railway Company (Hiroden). It replaced Hiroden's ailing fleet of Siemens Combinos in 2005.
The tram system in Augsburg is the second largest tram system in Bavaria behind Munich, and followed by Nurnberg. The system is 49.8 kilometers long and runs five lines, with two special lines. The city border gets crossed in three places. Line 2 and Line 6 cross into Stadtbergen, and line 6 crosses into Friedberg. The system is operated by Stadtwerke Augsburg (SWA), and integrated into the Augsburger Verkehrs- und Tarifverbund (AVV).
The Alstom Flexity is a family of trams, streetcars, and light rail vehicles manufactured by Bombardier Transportation until 2021, when French company Alstom took over Bombardier. As of 2015, more than 3,500 Flexity vehicles are in operation around the world in Europe, Asia, Oceania, and North America in 100 cities among 20 countries internationally. Production of the vehicles is done at Bombardier's global production plants and by local manufacturers worldwide through technology transfer agreements.
The Duewag GT8 Typ Freiburg is a three-part eight-axle articulated tram used on Freiburg im Breisgau's tram network. From 1971 to 1991, these trams were exclusively produced for the Freiburger Verkehrs by the Düsseldorfer Waggonfabrik in three series, which is why they are defined as the Freiburg type, Typ Freiburg. They are designed to be used uni-directionally.