S3 (Rhine-Ruhr S-Bahn)

Line S3 is a S-Bahn in the Rhein-Ruhr network. It runs from Oberhausen over Essen to Hattingen Mitte. It is operated at 20 minute intervals, using class 422 four-car electrical multiple units.

Line S 3 mainly runs over three lines built or acquired by the Bergisch-Märkische Railway Company:

Its last 1.2 km to Hattingen Mitte runs over the Wuppertal-Wichlinghausen–Hattingen railway opened by the Prussian state railways in 1884 and a short section of line opened by Deutsche Bundesbahn in 1987, including a 100 metre long tunnel.

S-Bahn services commenced between Oberhausen and Hattingen on 26 May 1974. Services were extended from Hattingen to Hattingen Mitte on 3 July 1987.