The Berlin U-Bahn is a rapid transit system in Berlin, the capital and largest city of Germany, and a major part of the city's public transport system. Together with the S-Bahn, a network of suburban train lines, and a tram network that operates mostly in the eastern parts of the city, it serves as the main means of transport in the capital.
The Berlin S-Bahn is a rapid transit railway system in and around Berlin, the capital city of Germany. It has been in operation under this name since December 1930, having been previously called the special tariff area Berliner Stadt-, Ring- und Vorortbahnen. It complements the Berlin U-Bahn and is the link to many outer-Berlin areas, such as Berlin Brandenburg Airport. As such, the Berlin S-Bahn blends elements of a commuter rail service and a rapid transit system.
U1 is a line on the Berlin U-Bahn, which is 8.8 kilometres (5.5 mi) long and has 13 stations. Its traditional line designation was BII. It runs east–west and its eastern terminus is Warschauer Straße S-Bahn station where it connects to the Schlesische Bahn. From there it runs through Kreuzberg via Gleisdreieck and Wittenbergplatz on to the Kurfürstendamm.
U2 is a line of the Berlin U-Bahn. The U2 line starts at Pankow S-Bahn station, runs through the eastern city centre (Alexanderplatz) to Potsdamer Platz, the western city centre and finally to the Ruhleben terminal station.
The U4 is a line of the Berlin U-Bahn in Germany, the shortest in Berlin's U-Bahn system with a length of 2.86 kilometres (1.78 mi). It serves five stations, with only the two termini being step-free. Opened in 1910, it is the only subway line in Berlin to have never been extended and the only one to have no night service on weekends.
U5 is a line on the Berlin U-Bahn. It runs from Hauptbahnhof in Mitte eastwards through Alexanderplatz, Friedrichshain, Lichtenberg and Friedrichsfelde, surfaces in Biesdorf-Süd to pass Kaulsdorf and Hellersdorf above ground and finally reaches city limits at Hönow.
The U7 is a rail line on the Berlin U-Bahn. It runs completely underground for a length of 31.8 kilometres (19.8 mi) through 40 stations and connects Spandau, via Neukölln, to Gropiusstadt and Rudow. The line was originally the south-eastern branch of the Nord-Süd-Bahn (U6) that ran between the branching point at Belle-Alliance-Straße (Mehringdamm) and Grenzallee; however, in the 1960s, this stretch was separated from the rest of the line and extended at each end to form a new line. As of 2007, the U7 is Berlin's longest underground line, both in terms of absolute length and total travel time, and one of the longest (entire) subterranean lines in Europe.
Jakob-Kaiser-Platz is a metro station on the Berlin U-Bahn line U7, located in the Charlottenburg-Nord district. It was opened on 1 October 1980 with the line's extension from Richard-Wagner-Platz to Rohrdamm. The eponymous traffic circle located above the station is named after politician and Resistance fighter Jakob Kaiser (1888–1961). The next station going eastbound is Jungfernheide
Berlin Jungfernheide is a railway station located at Charlottenburg-Nord, in the Charlottenburg-Wilmersdorf district of Berlin, served by the S-Bahn lines and , the U-Bahn line and Regional-Express trains of the Deutsche Bahn. Its name literally translates into "maidens' heathland"; it was named after the Jungfernheide, a former large forest in the proximity of this station.
U3 is a line on the Berlin U-Bahn created in its current version on 7 May 2018.
Alfred Frederik Elias Grenander was a Swedish architect, who became one of the most prominent engineers during the first building period of the Berlin U-Bahn network in the early twentieth century.
Gleisdreieck is an elevated Berlin U-Bahn station located on a viaduct in the Kreuzberg district, and served by lines U1, U2, and U3. The U1/U3 platform is at a higher level than, and perpendicular to, that of the U2.
Ernst-Reuter-Platz is a Berlin U-Bahn station on line U2, located in the Charlottenburg district.
Bismarckstraße is a Berlin U-Bahn station on lines U2 and U7, located in the Charlottenburg district. It was opened in 1978 on the eponymous street, a major arterial road named after Otto von Bismarck.
Richard-Wagner-Platz is a Berlin U-Bahn station located on the in the Charlottenburg district.
Berlin Ostkreuz station is a station on the Berlin S-Bahn suburban railway and the busiest interchange station in Berlin. It is in the former East Berlin district of Friedrichshain, now part of the borough of Friedrichshain-Kreuzberg. A smaller part of the station is in Rummelsburg, part of the borough of Lichtenberg. The station is a Turmbahnhof with the Berlin–Frankfurt (Oder) railway and the Prussian Eastern Railway on the lower level and the Berlin Ringbahn on the upper level. It is used by a total of around 235,000 passengers every day on eight lines, entering or leaving.
Berlin Potsdamer Platz is a railway station in Berlin. It is completely underground and situated under Potsdamer Platz in central Berlin. Regional and S-Bahn services call at the station, and it is also served by U-Bahn line U2.
The North–South S-Bahn Tunnel is the central section of the North–South transversal Berlin S-Bahn connection crossing the city centre. It is not to be confused with the Tunnel Nord–Süd Fernbahn, the central tunnel part of the North–South main line used by intercity and regional trains. The S-Bahn North–South line encompasses the route from Bornholmer Straße and Gesundbrunnen via Friedrichstraße and Anhalter Bahnhof to Papestraße and Schöneberg.
The Berlin U-Bahn originated in 1880 with Werner Siemens' idea to build an urban railway in Berlin. During the nine years after the German Empire was founded, the city's population grew by over one-third and traffic problems increased. In 1896, Siemens & Halske began to construct the first stretch of overhead railway. On 1 April 1897, the company began construction of an electric underground railway. The Berliner Verkehrs Aktiengesellschaft (BVG) was formed in 1928, and took over further construction and operation of the network. In 1938, the company was renamed Berlin Transport Company; the original acronym, however, remained. Since 1994, the BVG has been a public company.
The tracks of the Berlin subway are lines operated in the line traffic, operating distances, which serve only internal purposes, turn-off and turning plants and plants in the operating farms.
: N2
: Berlin A/5555 [1] 
