This summer brings a new regional bike-sharing system, Metroradruhr, to ten industrial Ruhr valley cities. Started on June 18th in Dortmund, Germany the system has now reached five of the cities. Bikes are now, or soon will be, available in Bochum, Bottrop, Dortmund, Duisburg, Essen, Gelsenkirchen, Hamm, Herne, Mülheim an der Ruhr and Oberhausen. This is not just a series of suburban satellite a…