date ideer Christiansø - Dating plattform Mülheim an der Ruhr
However, most of Rhine-Ruhr tram lines still use metre gauge ()).
Witten joined in 1981, Recklinghausen left in 1982.
Therefore, these trams should be relocated to underground sections below city centers (as Stadtbahn lines) if they were not replaced by bus lines.
The cities of Bochum, Castrop-Rauxel, Dortmund, Duisburg, Essen, Gelsenkirchen, Herne, Mülheim an der Ruhr, Oberhausen, Recklinghausen and Wattenscheid founded the Stadtbahngesellschaft Ruhr in 1969 for coordinating the plans to transform tram routes into Stadtbahn routes.
There are five Stadtbahn systems that make up the Rhine-Ruhr Stadtbahn (their operating companies are shown in parentheses): Cross-platform interchanges were planned wherever useful and possible.
All Stadtbahn lines have been electrified with overhead catenary and are powered with direct current like former trams.