 At the time trams were considered outmoded and unmodern, so the government was willing to provide funds for removal and replacement.In 1967 the Bonn City Council approved a new transportation plan which included underground railway (U-Bahn) between Bonn and Bad Godesberg; the initial ground breaking took place in October of the same year.The overall concept involved a mixed system of trams (operated by the SSB) and heavy rail (operated by the KBE).