The Rhein-Ruhr area also contains some of the longest tram system in the world, with tram and Stadtbahn services from Witten to Krefeld in the VRR zone and Cologne to Bad Honnef and Siegburg via Bonn within the VRS zone. Besides the local public transportation there is an interconnected commuter rail network, with the Rhine-Ruhr S-Bahn network serving the Ruhr area as well as Düsseldorf and the S-Bahn Köln serving the area around Cologne.
The Rhein-Ruhr area also contains some of the longest tram system in the world, with tram and Stadtbahn services from Witten to Krefeld in the VRR zone and Cologne to Bad Honnef and Siegburg via Bonn within the VRS zone Besides the local public transportation there is an interconnected commuter rail network, with the Rhine-Ruhr S-Bahn network serving the Ruhr area as well as Düsseldorf and the S-Bahn Köln serving the area around Cologne.