Offenbach City Tunnel

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Offenbach City Tunnel
S-Bahnhof Offenbach Marktplatz.jpg
Offenbach-Marktplatz Station
Native name City-Tunnel Offenbach
Locale Hesse, Germany
Line number 3680
Line length 3.7 km (2.3 mi)
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge
Electrification 15 kV/16.7 Hz AC overhead catenary
Operating speed 80 km/h (49.7 mph) (maximum)
Maximum incline 4.0%
Route number 645.1, 645.2, 645.8, 645.9
Route map
end of Frankfurt City Tunnel
Frankfurt-Oberrad (planned)
main line to Hanau
Start of Offenbach City Tunnel
57.132 Offenbach-Kaiserlei
57.949 Ledermuseum
58.948 Marktplatz
60.320 End of Offenbach City Tunnel
main line from Offenbach Hbf
60.5 Offenbach-Ost
to Rodgau RailwayS1Frankfurt S1.svgS2Frankfurt S2.svg
to Hanau S8Frankfurt S8.svgS9Frankfurt S9.svg
Source: German railway atlas[1]

The Offenbach City Tunnel is a standard gauge railway in Offenbach am Main in the German state of Hesse. It is used by all of the eastern branches of the Rhine-Main S-Bahn (S1, S2, S8 and S9). It runs largely under Berliner Straße.


Planning options considered, the most northerly route was chosen

Several options were considered and the current route was selected in 1983. Finance for the project was agreed on 4 December 1986, and planning approval was achieved at the end of 1990, allowing construction to begin. However, the symbolic beginning of construction was on 23 March 1988. Parts of the new line run along or below the route of the former Lokalbahn line.

Commissioning and subsequent changes[edit]

The line between Frankfurt-Mühlberg and Offenbach Ost was opened on 23 May 1995. This was linked with the extension of line S8 to Hanau, while line S1 only went as far as Offenbach Ost. Line S2—which had previously terminated at Muhlberg—was diverted to Frankfurt South station.

Following the completion of the upgrading of the Rodgau Railway as well as the route to Dietzenbach on 23 March 2001 lines S1, S2, S8 and S9 now run through the Offenbach City Tunnel. Limited capacity in the Frankfurt City Tunnel until 13 June 2010, meant that line S2—in contrast to the other lines—could only run every half-hour, while additional peak hour S2 trains could only operate between Dietzenbach and Offenbach Hauptbahnhof and between Frankfurt Hauptbahnhof and Niedernhausen rather than use the tunnel.

In the course of the Offenbach City Tunnel, S-Bahn trains stop at three stations: Kaiserlei, Ledermuseum (Leather Museum) and Marktplatz. All stations are very similar in construction.


  1. ^ Eisenbahnatlas Deutschland (German railway atlas). Schweers + Wall. 2009. ISBN 978-3-89494-139-0. 


  • Eisenbahnen in der Region Frankfurt RheinMain (Railways in the Frankfurt Rhine-Main region) (in German). Darmstadt: Hestra-Verlag. 2002. ISBN 3-7771-0304-7. 
Offenbach Ost station