Route of S12
20.5
 Horrem S19
25.4
 Frechen-Königsdorf S19
28.1
 Köln-Weiden West S19
29.5
 Köln-Lövenich S19
33.3
 Köln-Müngersdorf Technologiepark S19
35.5
 Köln-Ehrenfeld S19
38.4
 Köln Hansaring S6S11S19
39.2
 Köln Hbf S6S11S19
40.3
 Köln Messe/Deutz S6S11S19
 Köln Trimbornstr. S19
 Köln Airport Businesspark
 Köln Steinstraße
49.9
 Porz (Rhein)
52.7
 Porz-Wahn S19
57.2
 Spich S19
60.0
 Troisdorf S19
64.6
 Siegburg/BonnS19
71.1
 Hennef (Sieg) S19
73.0
 Hennef im Siegbogen S19
75.6
 Blankenberg (Sieg)S19
78.7
 Merten (Sieg) S19
83.3
 Eitorf S19
90.1
 Herchen S19
95.3
 Dattenfeld S19
98.6
 Schladern (Sieg) S19
100.4
 Rosbach (Sieg) S19
105.1
 Au (Sieg)S19
Source: German railway atlas[1]

Line S12 is a S-Bahn line of the S-Bahn Köln network in Germany. It is operated by DB Regio using class 423 electric multiple units. The S12 runs from Horrem via Cologne to Au (Sieg). It shares this route for most of its run with the S 19. With over 105 kilometres (65 mi), it is the second longest S-Bahn line in North Rhine-Westphalia, after S9.

The S12 operates every 20 minutes on workdays between Köln Ehrenfeld and Hennef (Sieg), with every third train continuing to Au (Sieg). The S19 also operates hourly between Au (Sieg) and Hennef, so there is a 30 minute clock. During rush hour, the S12 gets extended to Horrem, so with the S19 six trains operate hourly in each direction between Cologne and Horrem. Services operates every 20 minutes on Saturdays and every 30 minutes on Sundays and public holidays. On Sundays and public holidays the S12 operates every 30 minutes between Horrem and Au (Sieg).

The route runs on the Cologne–Aachen line (opened by the Rhenish Railway Company between Cologne and Horrem in three stages between 1839 and 1841), the East Rhine Railway (opened to Troisdorf by the Rhenish Railway in 1870, with an extension to Cologne opened in 1874) and the Sieg Railway (opened by the Cologne-Minden Railway Company between 1859 and 1862). The eastern section of the S 12 service from Au (Sieg) to Köln-Nippes was opened on 2 June 1991. It was extended to Düren on 13 June 2004, dropping Köln-Nippes. It was cut back to Horrem in December 2015.[2]

References

  1. ↑ Eisenbahnatlas Deutschland (German railway atlas). Schweers + Wall. 2009. pp. 63–4, 146–9. ISBN 978-3-89494-139-0.
  2. ↑ "S12, Düren - Köln Troisdorf Hennef - Au". NRW Rail Archive (in German). André Joost. Retrieved 25 August 2011.
Düren station
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