|}
Line S3 is a S-Bahn

S-Bahn

S-Bahn refers to an often combined city center and suburban railway system metro in Austria, Germany, Switzerland and Denmark...

 in the Rhein-Ruhr

Rhein-Ruhr S-Bahn

The Rhine-Ruhr S-Bahn is a polycentric S-Bahn network covering the Rhine-Ruhr Metropolitan Region in the German federal state of North Rhine-Westphalia. This includes most of the Ruhr , the Berg cities of Wuppertal and Solingen and parts of the Rhineland...

 network. It runs from Oberhausen over Essen

Essen Hauptbahnhof

is the Hauptbahnhof for the city of Essen in western Germany. It is situated south of the old town centre, next to the A 40 motorway.It was opened in 1862 by the Bergisch-Märkische Eisenbahn...

 to Hattingen Mitte

Hattingen (Ruhr) Mitte station

Hattingen Mitte is a railway station situated in Hattingen in western Germany. It is a terminus station for the S3 line of Rhine-Ruhr S-Bahn and is classified by Deutsche Bahn as a category 6 station....

. It is operated at 20 minute intervals, using class 422

DBAG Class 422

The Class 422 is a series of four-car electric multiple units that are a derivative of the DBAG Class 423.- History :The units were commissioned by Deutsche Bahn in 2005...

 four-car electrical multiple 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
  Essen-Steele Ost station
  Essen-Steele Ost station is located in the district of Essen-Steele in the German city of Essen in the German state of North Rhine-Westphalia. It is on the Witten/Dortmund–Oberhausen/Duisburg line and is classified by Deutsche Bahn as a category 4 station....
  
   over the Witten/Dortmund–Oberhausen/Duisburg railway, opened in 1862,
• from Essen-Steele Ost to Bochum-Dahlhausen
  Bochum-Dahlhausen station
  Bochum-Dahlhausen station is located in the Dahlhausen district of Bochum in the German state of North Rhine-Westphalia. The station building dates from the time of the First World War.-History :...
  
   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
  Hattingen (Ruhr) station
  Hattingen station is located in the town of Hattingen on the Ruhr river in the German state of North Rhine-Westphalia and is classified by Deutsche Bahn as a category 5 station..-History:...
  
   over the Ruhr Valley Railway, opened in 1869.

Its last 1.2 km to Hattingen Mitte runs over the Wuppertal-Wichlinghausen–Hattingen railway opened by the Prussian state railways

Prussian state railways

The term Prussian state railways encompasses those railway organisations that were owned or managed by the State of Prussia...

 in 1884 and a short section of line opened by Deutsche Bundesbahn

Deutsche Bundesbahn

The Deutsche Bundesbahn or DB was formed as the state railway of the newly established Federal Republic of Germany on September 7, 1949 as a successor of the Deutsche Reichsbahn-Gesellschaft '...

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.