The Vienna U-Bahn () is a rapid transit system serving Vienna, Austria. The five-line network consists of of route, serving 109 stations. 459.8 million passengers rode the U-Bahn in 2019.
The modern-day U-Bahn opened on 25 February 1978, after test operations that began on 8 May 1976. Parts of two of the lines, designated U4 and U6, date back to the Stadtbahn ("city railway") system, which opened in 1898. Parts of the U2 and U6 lines began as subway tunnels built to accommodate earlier tram lines. Only the U1 and U3 were built wholly as new subway lines.
Lines are designated by a number and the prefix "U" (for U-Bahn) and identified on station signage and related literature by a colour. There are five lines; U1, U2, U3, U4 and U6. Since the late 1960s there have been numerous suggestions of routings for a line U5, but all these projects had been shelved until the construction of a new U5 was announced in early 2014. Stations are often named after streets, public spaces, or districts, and in some special cases after prominent buildings at or near the station. The policy of the Wiener Linien, however, states that they prefer not to name stations after buildings.
Ticketing for the network is integrated under the Verkehrsverbund Ost-Region (VOR) along with other means of public transport in Vienna, including trams and buses. Local tickets are valid on S-Bahn suburban rail services and other train services but those are operated by the state railway operator, ÖBB. Tickets are not valid on bus services operated by Vienna Airport Lines or the City Airport Train express train.
U-Bahn network With the September 2017 opening of the , five-station extension of the U1 line, the five-line U-Bahn network consists of of route, serving 109 stations. Further extensions of the Vienna U-Bahn are scheduled to be completed in 2026-2032, finally creating the missing line U5. Upon completion of the U5 and U2 projects, there will then be a network that is long with 116 stations.Hödl, J: Das Wiener U-Bahn-Netz, Wiener Linien, 2009. Some plans have been proposed for the system beyond 2032, when the U2/U5 project is completed, although such plans are currently unfunded.
U-Bahn services run between 05:00 and around 01:00 at intervals between two and five minutes during the day and up to eight minutes after 20:00. Since 4 September 2010, there has been 24-hour service operating at 15-minute intervals on Friday and Saturday evenings, and on evenings prior to a public holiday. The 24-hour U-Bahn is supplemented on these nights by the Vienna NightLine bus service.
Line Colour Route Length Stations Red – 19.2 km (11.9 mi) 24 Purple – 17.2 km (10.4 mi) 21 Orange – 13.5 km (8.4 mi) 21 Green – 16.5 km (10.3 mi) 20 Brown – 17.4 km (10.8 mi) 24
Stations
Metropolitan railway and underground trams
The stretch between Heiligenstadt and Hütteldorf, covering modern day U4, used to be part of the metropolitan railway (Stadtbahn). The stretch between Längenfeldgasse and Spittelau, covering most of U6, also used to be a part, although Spittelau wasn't a station yet. The stretch between Karlsplatz and Schottenring (covering some of U2, and in the future some of it will cover a section of U5) was part of an underground tram network (U-Straßenbahn).
History and projected expansions Planning for an underground railway in Vienna can be traced back to the 1840s. Since then, there have been numerous plans and concessions to build such a project, making Vienna the city with the most subway planning.
The concession request of the engineer Heinrich Sichrowsky dates from 1844 with the idea of a pneumatic, or atmospheric, railway based on the system of Medhurst and Clegg. The trains would have been advanced pneumatically by stationary steam engine air pumps. Sichrowsky’s route would have led from Lobkowitzplatz, below the Vienna Glacis, and along the Wien River to Hütteldorf. Although such trains had been built in London and Paris, it found in Vienna no investors for its stock company, so this idea was rejected. The connecting railway project of Julius Pollak (1849) was also conceived as an atmospheric system. Sichrowsky's request was the starting point for a series of plans that were mostly not approved and could not be implemented. For example, in 1858 the city planner Ludwig Zettl proposed to make an overburden of the former moat instead of filling it, and then to set up a railroad tram in this enclosed ditch, which would bypass the city. This would have created a connection between the central station and the market halls, while at the same time the gas-lit tunnels were to serve as warehouses for food. By 1873, at least 25 plans for a municipal railway system came up, with only the Verbindungsbahn, which already appeared in the much larger overall plan by Carl Ritter von Ghega in his project for Vienna's urban expansion of 1858, being later implemented as part of the mainline railway line. Ghega had already worked out a belt railway project along the line wall in 1845. The first planning for a subway in deep-seated tunnels by Emil Winkler dates back to 1873, with planning proposals that were also based on the first systematic traffic census in Vienna.
Another wave of public transport projects were developed as the ring road was close to be finished. The conception of the British engineers James Bunton and Joseph Fogerty won out, since their plans, approved in 1881, included trains to be run in tunnels, in open incisions, and on elevated tracks.
In 1883, the project of an "electric secondary railway" of the company Siemens & Halske planned for a small profile rail system with three lines. The construction failed due to the concern of the city council that inner city business life could be affected, especially since the project for the first time ever included a tunneling of the city center.
The first system to be constructed was a four-line Stadtbahn railway network (which had been planned to have three main and three local lines) using steam trains. Ground was broken in 1892, and the system was opened in stages between 11 May 1898 and 6 August 1901. At Hütteldorf, the Stadtbahn connected to railway service to the west, and at Heiligenstadt, to railway service on the Franz Josef Line, which then ran northwestwards within the Austro-Hungarian Empire to Eger. Some of the Jugendstil stations for this system designed by Otto Wagner are still in use. However, the Stadtbahn proved inadequate for mass transport, less successful than the tramway. Starting in 1910, plans were considered for an underground system, but were interrupted by the First World War, which also necessitated closing the Stadtbahn to civilian use. After the war, the economic situation of a smaller and poorer country ruled out continuing with the plan. However, starting on 26 May 1924 the Stadtbahn was electrified, something that many had called for before the war, and from autumn 1925 it was integrated with the tramway rather than the railways. The frequency of trains tripled. Plans for a U-Bahn dating to 1912–14 were revived and discussions took place in 1929, but the Great Depression again necessitated abandoning planning.
Both in 1937 and after the Anschluß, when Vienna became the largest city by surface area in Nazi Germany, ambitious plans for a U-Bahn, and a new central railway station, were discussed. Test tunnelling took place, but these plans, too, had to be shelved when the Second World War broke out.
Severe war damage caused the Stadtbahn system to be suspended in some areas until 27 May 1945. The redevelopment of stations took until the 1950s. Meanwhile, Vienna was occupied by the four allied powers until 1955, and in 1946 had returned three quarters of the pre-war expanded Greater Vienna to the state of Lower Austria. Two proposals for U-Bahn systems were nonetheless presented, in 1953 and 1954. Increasing car traffic led to cutbacks in the S-Bahn network that were partially made up for by buses. The U-Bahn issue was also politicised: in the 1954 and 1959 city council elections, the conservative Austrian People's Party championed construction of a U-Bahn, but the more powerful Social Democratic Party of Austria campaigned for putting housing first. The city council repeatedly rejected the U-Bahn idea in the late 1950s and early 1960s.
Extensions of the Stadtbahn system had always been discussed as an alternative to building a new U-Bahn. But it was not until the late 1960s, when the Stadtbahn and the Schnellbahn were no longer able to adequately serve the ever-increasing public traffic, that the decision to build a new network was taken. On 26 January 1968, the city council voted to begin construction of a basic network (Grundnetz). Construction began on 3 November 1969 on and under Karlsplatz, where three lines of the basic network were to meet, and where central control of the U-Bahn was located. Test operation began on 8 May 1976 on line U4, and the first newly constructed (underground) stretch of line opened on 25 February 1978 (five stations on U1 between Reumannplatz and Karlsplatz).
The construction of the Vienna U-Bahn network can be divided into several stages:
Initial construction (1969–1982): Basic network (Grundnetz)
First, the basic network (Grundnetz) was chosen from the various network designs. During 1967, plans for the U2 were radically reduced and the U3 completely deleted, and the approved basic network was described as a 'closer basic network'. This closer basic network, consisting of the U1, U2 and U4 lines, included:
New route between Reumannplatz and Praterstern U2 between Karlsplatz and Schottenring U4 between Hütteldorf and Heiligenstadt, consisting almost entirely of modification and adaptation of the existing Stadtbahn line
Construction began on 3 November 1969. On 25 February 1978, the first Vienna U-Bahn route between Karlsplatz and Reumannplatz, the U1, went into operation. With twelve partial commissionings, the Vienna U-Bahn basic network was completed on 3 September 1982.
Missing U5 Placeholder line numbers were awarded during initial planning of the Vienna subway network between 1966 and 1973. The designation U5 was used in initial and later plans, but ultimately none of the segments with its numeration were approved for construction. In early expansion variant plans, the U5 would have run between Meidlinger Hauptstraße and St. Marx using the already partially-tunneled southern belt route. It later referred to the current branch of the line U2 from Schottenring to the stadium, which was planned to connect to a new segment to Hernals. , there is no U5 line; today's U2 line consists of parts of the previously planned U2 and U5, which are connected by an arc between the stations Rathaus and Schottentor (this was originally planned only as an operating track and is still the narrowest curve in the Vienna subway network). The designation U3 was for a long time a gap in the network, but there was already in the construction of the basic network preliminary work. Thus, the entire tunnel tube of the U3 between Naglergasse / Graben and Stubentor was completed during construction of the U1 (at Stephansplatz), in order to avoid further excavation work in the area of the cathedral.
Since 2003, several plans and internal working papers of Vienna have again been planning long-term plans for a U5 line, but only in early 2014 did they again make concrete efforts to actually realize the line. Finally, in March 2014, it was announced that the U5 line would be constructed in several stages of development as part of a U2 / U5 line cross.