S3 (Rhine-Ruhr S-Bahn)
Introduction '''Line S3''' is a S-Bahn in the Rhein-Ruhr network. It runs from Oberhausen over Essen to  Hattingen Mitte. It is operated at 30-minute intervals, using Stadler FLIRT 3XL units.Line S 3 mainly runs over three lines built or acquired by the Bergisch-Märkische Railway Company:* from Oberhausen Hauptbahnhof to Essen-Steele Ost over the Witten/Dortmund–Oberhausen/Duisburg railway, opened in 1862,* from Essen-Steele Ost to Bochum-Dahlhausen over the Essen-Überruhr–Bochum-Langendreer railway, which was a former coal railway that was converted to standard gauge in 1865 and taken over by the Bergisch-Märkische Railway in 1870,* from Bochum-Dahlhausen to Hattingen over the Ruhr Valley Railway, opened in 1869.Hattingen (Ruhr) Mitte station 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.
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