The North–South S-Bahn Tunnel () is the central section of the North–South transversal
Berlin S-Bahn
The Berlin S-Bahn () is a rapid transit railway system that services the reigon in and around Berlin, the capital city of Germany. It has been in operation under the name since December 1930, having been previously called the special tariff are ...
connection crossing the
city centre
A city centre, also known as an urban core, is the Commerce, commercial, Culture, cultural and often the historical, Politics, political, and geographic heart of a city. The term "city centre" is primarily used in British English, and closely e ...
. It is not to be confused with the ', 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 and via and to (today ) and .
The North–South S-Bahn Tunnel has a limited profile (
loading gauge
A loading gauge is a diagram or physical structure that defines the maximum height and width dimensions in railway vehicles and their loads. Their purpose is to ensure that rail vehicles can pass safely through tunnels and under bridges, and k ...
- G2) with a height of above the trackhead and a width of .
Function
This tunnel originally provided an S-Bahn connection from the former mainline stations of
Anhalter Bahnhof
The Anhalter Bahnhof is a former train station, railway terminus in Berlin, Germany, approximately southeast of Potsdamer Platz. Once one of Berlin's most important railway stations, it was severely damaged in World War II, and finally closed fo ...
and
Potsdamer Bahnhof with the interchange for the east–west
''Stadtbahn'' at
Friedrichstraße
Friedrichstraße, or Friedrichstrasse (see ß; ) (lit. ''Frederick Street''), is a major culture and shopping street in central Berlin, forming the core of the Friedrichstadt neighborhood and giving the name to Berlin Friedrichstraße stat ...
and on to the ''Stettiner Bahnhof'' (today:
Nordbahnhof). The tunnel connects three southerly suburban lines (the
Wannsee Railway from
Wannsee
Wannsee () is a locality in the southwestern Berlin borough of Steglitz-Zehlendorf, Germany. It is the westernmost locality of Berlin. In the quarter there are two lakes, the larger '' Großer Wannsee'' (Greater Wannsee) and the '' Kleiner Wannse ...
, the
Anhalt Suburban Line from
Teltow Stadt and the
Dresden line from
Blankenfelde) with three northerly suburban lines (the
Kremmen Railway
The Kremmen Railway () is a line in northern Berlin and Brandenburg, Germany. It branches off the Prussian Northern Railway in the Berlin district of Reinickendorf, north of Schönholz station (formerly ''Schönholz-Reinickendorf'') and then pa ...
from
Hennigsdorf
Hennigsdorf () is a town in the district of Oberhavel, in Brandenburg, in eastern Germany. It is situated north-west of Berlin, just across the city border, which is formed mainly by the Havel river.
History
The town was first mentioned in 1375, ...
, the
Northern Railway from
Oranienburg
Oranienburg () is a town in Brandenburg, Germany. It is the capital of the district of Oberhavel.
Geography
Oranienburg is on the banks of the River Havel, 35 km north of the centre of Berlin.
Division of the town
Oranienburg consists of ni ...
and the
''Stettiner Bahn'' from
Bernau).
History
The idea of a north–south cross-town railway emerged not long after the completion of the east–west cross-town railway called the ''Stadtbahn'' ("City Railway") in 1882. The construction of an elevated line like the ''Stadtbahn'' was ruled out because of extensive building along the route, and a tunnel would have been highly problematic in the steam age.
By the end of the 19th century, Siemens proposed an underground line similar to the lines that later became what is today called the
''U-Bahn'', connecting the ''Wannsee'' substation of the ''Potsdamer Bahnhof'' to the then ''Stettiner Bahnhof''. In 1911, within the framework of a much broader competition for proposals for the further development of the city of Berlin, several proposals for such a north–south railway interconnection were set forth. The discussion was revived in the 1920s after the
First World War
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
. The advent of
electrification
Electrification is the process of powering by electricity and, in many contexts, the introduction of such power by changing over from an earlier power source. In the context of history of technology and economic development, electrification refe ...
made a tunnel solution possible.
The work was finally begun in 1933 as one of the public works undertaken by the new
National Socialist
Nazism (), formally named National Socialism (NS; , ), is the far-right totalitarian socio-political ideology and practices associated with Adolf Hitler and the Nazi Party (NSDAP) in Germany. During Hitler's rise to power, it was frequen ...
government to put the unemployed to work. The decision was taken in 1933, plans were made, and the first stones were moved in 1934.
Building
Because of the number of
underground lines to be crossed, the need to pass under rivers and streams meant that tight curves, small-profile tunnels and steeper inclines than normal were incorporated into the planning parameters.
Building commenced in 1934 with the construction of the new stations
Bornholmer Straße north of the S-Bahn Ring and
Humboldthain inside the Ring between
Berlin Gesundbrunnen and the then still existing
Stettiner Bahnhof.
The tunnel section from north of the ''Stettiner Bahnhof'' to the new station
Unter den Linden
Unter den Linden (, "under the Tilia, linden trees") is a boulevard in the central Mitte (locality), Mitte district of Berlin, Germany. Running from the Berlin Palace to the Brandenburg Gate, it is named after the Tilia, linden trees (known ...
was opened on 28 May 1936, just in time for the
1936 Berlin Olympics
The 1936 Summer Olympics (), officially the Games of the XI Olympiad () and officially branded as Berlin 1936, were an international multi-sport event held from 1 to 16 August 1936 in Berlin, then capital of Nazi Germany. Berlin won the bid to ...
, despite the collapse of a section of the tunnelling work near the
Brandenburger Tor
The Brandenburg Gate ( ) is an 18th-century neoclassical monument in Berlin. One of the best-known landmarks of Germany, it was erected on the site of a former city gate that marked the start of the road from Berlin to Brandenburg an der Havel ...
(adjacent to the US-American Embassy) on August 20, 1935, killing 19 workers.
This stretch was extended to the new underground
Potsdamer Platz station in April 1939, and the connection to the Southern suburban lines via
Anhalter Bahnhof
The Anhalter Bahnhof is a former train station, railway terminus in Berlin, Germany, approximately southeast of Potsdamer Platz. Once one of Berlin's most important railway stations, it was severely damaged in World War II, and finally closed fo ...
was opened on 9 October 1939.

The construction of the Southern section was marred by a number planning changes. The original plan, as it stood in 1936, was to introduce the
Ringbahn, which branched to the
Potsdamer Bahnhof (actually the ''Potsdamer Ring- und Vorortbahn'' adjacent to the Potsdamer Bahnhof) into the underground Potsdamer Platz station separately from the three southern suburban lines, and into the two centre tracks, after driving the ''Ringbahn'' branch into the underground at about the same location of the then ''Potsdamer Ring- und Vorortbahnhof'' serving the Ringbahn branch and the two suburban lines on the Anhalter and Dresden railway lines. Those Ringbahn trains would reverse in a staging area north of the underground Potsdamer Platz station, which was designed as the upper level of the two-floor tunnel underneath the north–south street formerly and later called ''Ebertstraße'' but back then ''Hermann-Göring-Straße''. This two-level design was chosen out of the scarcity of space, and in order to allow a later extension to the then
Lehrter Bahnhof and its suburban lines to
Nauen
Nauen is a small town in the Havelland (district), Havelland district, in Brandenburg, Germany. It is chiefly known for Nauen Transmitter Station, the world's oldest preserved radio transmitting installation.
Geography
Nauen is situated within t ...
and
Wustermark.
This stabling and reversal yard with its inherent possibility of extension north could be used as part of the
S21 line to the new
Berlin Hauptbahnhof
Berlin Hauptbahnhof () (English: Berlin Central Station) is the main railway station in Berlin, Germany. It came into full operation two days after a ceremonial opening on 26 May 2006. It is located on the site of the historic Lehrter Bahnhof, ...
, then on to the northern section of the Ringbahn.

The original plan also envisaged uniting the Wannseebahn and the Ringbahn branch by converting the ''Kolonnenstraße'' station serving the Ringbahn branch to an interchange station between the Ringbahn branch and the Wannseebahn, and the construction of a new station just south of the
Landwehrkanal
The Landwehr Canal (), is a canal parallel to the Spree river in Berlin, Germany, built between 1845 and 1850 to plans by Peter Joseph Lenné. It connects the upper part of the Spree at the eastern harbour () in Friedrichshain with its lowe ...
as a replacement for the ''Potsdamer Ring- and Vorortbahnhof'' which moved north into the ''Potsdamer Platz'' underground station.
Owing to the planning for the transformation of the
''Reichshauptstadt'' the plan for this curve was not realised. Instead, spurs for a junction to Anhalter Bahnhof were built with the plan for a further underground section to and, south of the
Landwehr Canal
The Landwehr Canal (), is a canal parallel to the Spree river in Berlin, Germany, built between 1845 and 1850 to plans by Peter Joseph Lenné. It connects the upper part of the Spree at the eastern harbour () in Friedrichshain with its low ...
, four tunnel spurs taking the North–South Line to the planned S-Bahn station .
But all further construction was halted by the war which Hitler began a few weeks before the Grand Opening of the complete North-South S-Bahn line.
Flooding
(see also
History of the Berlin U-Bahn#World War II)
Shortly before the end of the
Second World War
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
on 2 May 1945, there was a detonation of explosives under the
Landwehrkanal
The Landwehr Canal (), is a canal parallel to the Spree river in Berlin, Germany, built between 1845 and 1850 to plans by Peter Joseph Lenné. It connects the upper part of the Spree at the eastern harbour () in Friedrichshain with its lowe ...
. As a result, the entire tunnel and (via a connecting tunnel at Friedrichstraße) part of the Berlin U-Bahn, and S-Bahn were inundated. There are few other examples in the history of Berlin that have produced so much conflicting information. It is debatable whether people were drowned during the flooding, because it is possible these drownings were confused with the 80 to 130 bodies of victims of the last days of the war, who died before the tunnel was flooded. Also debatable (and to this day also unclear) is who actually demolished the tunnel and who had ordered it. In order to cause such an explosion, a very good knowledge of the area and buildings would be required. One theory states that the explosion was undertaken by members of the
SS. There are few eyewitnesses who can actually verify this. Rather they report that in the last days of the war the tunnel was already partially flooded with fresh and sewage water that was leaking from damaged pipes.
Restoration
Although the repairs were begun immediately after 1945, the tunnel could not be used again until 1947. The S-Bahn lines of the southerly suburban lines first had to be taken back to the overground Potsdamer Bahnhof before, in 1946, it was possible to use the underground line to Anhalter Bahnhof again.
Division of Berlin
With the building of the
Berlin Wall
The Berlin Wall (, ) was a guarded concrete Separation barrier, barrier that encircled West Berlin from 1961 to 1989, separating it from East Berlin and the East Germany, German Democratic Republic (GDR; East Germany). Construction of the B ...
in 1961 all the stations in
East Berlin
East Berlin (; ) was the partially recognised capital city, capital of East Germany (GDR) from 1949 to 1990. From 1945, it was the Allied occupation zones in Germany, Soviet occupation sector of Berlin. The American, British, and French se ...
were shut, except for Friedrichstraße which was used as a border crossing point. Trains that were now only for use in
West Berlin
West Berlin ( or , ) was a political enclave which comprised the western part of Berlin from 1948 until 1990, during the Cold War. Although West Berlin lacked any sovereignty and was under military occupation until German reunification in 1 ...
travelled between Anhalter Bahnhof via Friedrichstraße to
Humboldthain without stopping. On the evening of 8 January 1984, operation of the section was handed over to the
Berliner Verkehrsbetriebe
The (German: 'Berlin Transport Company') is the main public transport company of Berlin, the capital city of Germany. It manages the city's (underground), trams in Berlin, tram, bus transport in Berlin, bus, replacement services (EV) and fe ...
(BVG). The restoration of traffic through the tunnel restarted in May of that year. No works were allowed to be carried out on the Nord-Süd Tunnel during the division of Berlin.
Reunification
The Berlin Nord-Süd Tunnel had been heavily renovated three times, twice during the time of
East German
East Germany, officially known as the German Democratic Republic (GDR), was a country in Central Europe from its formation on 7 October 1949 until its reunification with West Germany (FRG) on 3 October 1990. Until 1989, it was generally vie ...
rule, and with the installation of a new signalling system in the later phase. When the Berlin Wall was opened and destroyed in 1990, discussions were ongoing to reopen all the Berlin Nord-Süd Tunnel stations in March 1990 together with the
U6 and
U8. However, Oranienburger Straße, Nordbahnhof and Unter den Linden stations began the modernisation programme to remove armed guards and out-of-bounds signage, and to do thorough cleanup work, with Oranienburger Straße reopening on 2 July 1990, while Nordbahnhof, together with Unter den Linden reopened on 1 September 1990.
Bornholmer Straße, a station that straddled the former "sector boundary" (between
East
East is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth.
Etymology
As in other languages, the word is formed from the fact that ea ...
and
West Berlin
West Berlin ( or , ) was a political enclave which comprised the western part of Berlin from 1948 until 1990, during the Cold War. Although West Berlin lacked any sovereignty and was under military occupation until German reunification in 1 ...
), reopened on 22 December 1990, and there were no checkpoint and armed guards before then. The eastern part was opened fully in March 1991.
The first comprehensive renovation since 1945 started from January 1991 in subsections, but was converted in mid-1991 to a complete closure due to the high levels of dust. The
Deutsche Reichsbahn
The ''Deutsche Reichsbahn'' (), also known as the German National Railway, the German State Railway, German Reich Railway, and the German Imperial Railway, was the Weimar Republic, German national Rail transport, railway system created after th ...
replaced almost all the material in the tunnel walls, then cleaned and recoated them. Hence the wartime flood damage to the tunnel was finally removed. This was finally achieved on 1 March 1992 when Potsdamer Platz was reopened. The border controls were abolished on 23 July 1990. During the refurbishment of Potsdamer Platz, opaque glass panels were installed, but other errors have been committed: the station labels differ from the Tannenberg
Fraktur
Fraktur () is a calligraphic hand of the Latin alphabet and any of several blackletter typefaces derived from this hand. It is designed such that the beginnings and ends of the individual strokes that make up each letter will be clearly vis ...
of the originals, and the letters of the platform-side walls are convex rather than sunk into the shallow etched-glass panels. The original pattern can be seen at the Berlin S-Bahn Museum.
Another renovation began in February 2002 and ended in October 2002, which removed all the last traces of East Berlin.
The building of the new heavy-rail tunnel to the
''Hauptbahnhof'' and the connected electromagnetic effects of the overhead wiring meant that a new compatible signalling system had to be installed. This work was undertaken between July 2005 and May 2006. The North–South Line was the last section of the Berlin S-Bahn network to have the automatic
Block signalling
Signalling block systems enable the safe and efficient operation of railways by preventing collisions between trains. The basic principle is that a track is broken up into a series of sections or "blocks". Only one train may occupy a block at ...
of type AB 37 and Sv-Signals with aperture relay installed.
Specification
In order for the tunnel to follow the roadway in the heavily built-up city centre, the tightest curve in the North–South Tunnel is only . To operate the trains safely, this required a special profile to be developed for the wheels. The BVG encountered several derailments of its stock, which had only a standard wheel profile. The permissible height in the tunnel is also restricted. Therefore, trains of class
ET 169, which are longer and taller than typical Berlin S-Bahn stock, are also banned from the tunnel. The restrictions in carriage height and length continue to limit the trains that can be used, with only rolling stock specially developed for the Berlin S-Bahn (as of consist of classes
270/485,
480
__NOTOC__
Year 480 ( CDLXXX) was a leap year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Basilius without colleague (or, less frequently, year 1233 ''Ab urbe condita''). The denominat ...
,
481/482 and
483/484) allowed to use the tunnel. In particular, trains constructed for other cities cannot be used for the DC S-Bahn system of Berlin.
Stations
From north to south:
The present modern
Yorckstraße and
Yorckstraße (Großgörschenstraße) are two different stations, a few hundred metres apart, with separate entrances, although they are today collectively known as Yorckstraße with the U-Bahn
line U7 station oriented east–west between them.
The
architect
An architect is a person who plans, designs, and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that h ...
of most of the stations in the North–South tunnel is , specifically: Bornholmer Straße, Humboldthain, Oranienburger Straße (Brademann's first S-Bahn Underground station), Unter den Linden, Potsdamer Platz and Anhalter Bahnhof. Stettiner S-Bahnhof had Lüttich as its architect; Friedrichstraße had von Hane. Although they were built in the middle of the National Socialist period, the stations have none of the architecture of National Socialism, rather the officially taboo New Objectivity of the earlier Modern style. Except in a few details, e.g. the mosaic of the emblem in the northern distribution area of S-Bahnhof Potsdamer Platz, with its exit to the
New Reich Chancellery
The Reich Chancellery () was the traditional name of the office of the Chancellor of Germany (then called ''Reichskanzler'') in the period of the German Reich from 1878 to 1945. The Chancellery's seat, selected and prepared since 1875, was the fo ...
, the stations do not follow typical
National Socialist Architecture.
The stations were rehabilitated after the
fall of the communist government (the Wende) in the light of conservation issues, but important details were not faithfully restored, e.g. the typical station S-Bahn sign outside the station, designed by Richard Brademann, never matched the original. Closest to the original S-Bahn sign are the ones at Anhalter Bahnhof (although instead of the cast iron cutout in the shape of the S-Bahn "S", today they only have a backlit glass screen). During the renovation of Anhalter Bahnhof, the BVG (on behalf of the Senate Construction Administration) attempted to restore the original look of the station and placed enamelled tin plates on the walls. However, in contrast to the original white opaque glass panels, the new ones have completely different light reflections, and instead of white, inconspicuous seams between the panels, the seams reveal a black grid. At Potsdamer Platz they have installed opaque glass panels but have committed other errors: the station labels differ from the
Tannenberg Fraktur of the originals, and the letters of the platform-side walls are convex rather than set into the shallow etched glass panels. (The original pattern can be seen at the Berlin S-Bahn-Museum.) There are also signs in the Helvetica font which was until recently used by
Deutsche Bahn
(, ; abbreviated as DB or DB AG ) is the national railway company of Germany, and a state-owned enterprise under the control of the German government. Headquartered in the Bahntower in Berlin, it is a joint-stock company ( AG).
DB was fou ...
. During construction of the Regional station, the western part of the distribution hall between the surface and platforms has been cut off. More modern fixtures have also destroyed the original spatial effect.
Since 8 August 2009, in connection with the opening of the interchange with the new
U55 line, Unter den Linden has been renamed Brandenburger Tor, although the original name tiles remain on the station walls.
Planning and Development (S21)
In the medium term the north–south connections will be improved with a second north–south tunnel, connecting in a first phase the Hauptbahnhof with Potsdamer Bahnhof. This project is being pursued under the planning name of S21 and should improve the currently poor connection of the new Berlin Hauptbahnhof with the North–South S-Bahn line.
This project will proceed in the following stages:
* In the first stage the new section, will divert between the stations of
Wedding
A wedding is a ceremony in which two people are united in marriage. Wedding traditions and customs vary greatly between cultures, ethnicity, ethnicities, Race (human categorization), races, religions, Religious denomination, denominations, Cou ...
and
Westhafen
The Westhafen (German for ''West Harbor'') is Berlin's largest inland port, located in the district of Moabit.
The Westhafen has an area of 430,000 square meters and it is divided into two parallel harbor basins. It is connected to the Spree an ...
to ''Hauptbahnhof.'' A possible new station at
Perleberger Brücke () was considered but is not in current plans.
This section will allow trains from the ''Ringbahn'' and trains from the northerly suburban lines to connect to the ''Hauptbahnhof''. Underpasses under the
Ringbahn had already been built during the reconstruction of the ''Nordring'', the northern section of the ''Ringbahn''. This line runs above-ground, only diving down in a tunnel north of the
Minna-Cauer-Straße. The ''Hauptbahnhof'' station lies east of the
U-Bahn station Hauptbahnhof. Completion was initially planned for 2017 but has been postponed to 2022.
* In the second building stage the line will cross the
Spree river, pass along the eastern side of the
Reichstag building
The Reichstag (; ) is a historic legislative government building on Platz der Republik in Berlin that is the seat of the German Bundestag. It is also the meeting place of the Federal Convention, which elects the President of Germany.
The Ne ...
with a possible station there, connecting the upper level of the two-floor tunnel under the
Ebertstraße, which was built in 1935 to the existing station at Potsdamer Platz. originally built in 1935/36 only as reversing and siding tracks for the ''Ringbahn''-trains introduced into the
Potsdamer Platz
Potsdamer Platz (, ''Potsdam Square'') is a public square and traffic intersection in the center of Berlin, Germany, lying about south of the Brandenburg Gate and the Reichstag building, Reichstag (Bundestag, German Parliament Building), and ...
station. This would allow one of the trains running through the existing North–South Tunnel via the new connection to the ''Hauptbahnhof'' and further on to the northern section of the ''Ring'' and beyond. This second section is planned for completion in 2023.
* A third section that exists in the thinking of the planners would see a new north–south connection from Potsdamer Platz via a new interchange station at
Gleisdreieck (Berlin U-Bahn)
Gleisdreieck is an elevated Berlin U-Bahn List of Berlin U-Bahn stations, station located on a viaduct in the Kreuzberg district, and served by lines U1 (Berlin U-Bahn), U1, U2 (Berlin U-Bahn), U2, and U3 (Berlin U-Bahn), U3. The U1 (Berlin U-Ba ...
and onwards towards
Berlin Yorckstraße station (Großgörschenstraße), and interchange at
Julius-Leber-Brücke station with the Wannseebahn. This section would use the exits at the southern end of the underground Potsdamer Platz station, originally built in 1935/36 for the ''Ringbahn'' trains to terminate underground at ''Potsdamer Platz'' instead of further south at the ''Ringbahn'' station next to the
Potsdamer Bahnhof.
The additional usage of this section is limited as there is already a connection at Potsdamer Platz to the U2 Line and at Gleisdreieck only the U1 would be provided with an additional connection.
* A fourth section would divert from the new north–south connection to the Wannseebahn and then over the reinstated „
Cheruskerkurve“ () to the southerly part of the Ringbahn.
The building work for the northerly section up to the Hauptbahnhof, which will be funded by the German Federal Government via the law, costed 24 million Euro. The remaining section should, as envisaged by the financial planning for the Land of Berlin, be built by 2030.
In July 2007, Deutsche Bahn announced delays in the construction of the first stage. After they had concluded the financial agreement and thereby delayed the under-signing of the project, the building work would start in 2008, rather than at the end of 2007 as planned.
''Mehr Platz im ICE von Berlin nach Hamburg''
. In: ''Berliner Zeitung'' vom 19. Juli 2007
Some preparatory work has already been completed, including the diversions at the Ringbahn stations of Westhafen and Wedding, the preservation of the route during the building of the Hauptbahnhof and the Tiergartentunnel, along which the new line will run. To the south of the Hauptbahnhof the line will continue easterly of the Reichstag building and then crossing the U55 to the west of Brandenburger Tor where it will join the old North–South Tunnel. South of Potsdamer Platz the new line will divert from the old North–South Tunnel and run parallel to the U2 to Gleisdreieck before connect to the existing S-Bahn line at Yorckstraße (Großgörschenstraße). Connections at the north and south ends of Potsdamer Platz station already exist.
See also
* S-Bahn Berlin
The Berlin S-Bahn () is a rapid transit railway system that services the reigon in and around Berlin, the capital city of Germany. It has been in operation under the name since December 1930, having been previously called the special tariff are ...
, Stadtbahn
(; German for 'city railway'; plural ) 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 co ...
, Ringbahn
* Geisterbahnhöfe
A ghost station is a closed or never opened train station through which revenue-service passenger trains (especially rapid transit trains) pass but at which they do not stop. The term is also sometimes used for any unused underground station o ...
References
Further reading
* Dr. Michael Braun: ''Nordsüd-S-Bahn Berlin / 75 Jahre Eisenbahn im Untergrund'' Herausgeber: Berliner S-Bahn Museum, Verlag: GVE-Verlag, Berlin 2008.
*
*
*
External links
S-Bahn Berlin
(German)
(German)
(German)
(German)
{{DEFAULTSORT:Berlin Nord-Sud Tunnel
Railway tunnels in Germany
Tunnels in Berlin
Berlin S-Bahn
Tunnels completed in 1939
Underground commuter rail