S2 (Rhine-Ruhr S-Bahn)

It starts in Dortmund Hauptbahnhof and runs westerly.

During weekdays one service per hour runs each to Essen Hauptbahnhof and Recklinghausen Hauptbahnhof using Stadler FLIRT 3XL units.

[2][3] Line S2 runs over lines built by various railway companies: S-Bahn services commenced between Dortmund and Duisburg on 2 June 1991.

Services commenced between Dortmund and Essen on 29 September 1991.

[3] Services between Gelsenkirchen and Duisburg ended on 15 December 2019 and were replaced by the RB 32 (Rhein-Emscher-Bahn).