Albtalbahn
The acquisition of the Alb Valley Railway ("Albtalbahn") by the city of Karlsruhe, the establishment of AVG and the integration of the Alb Valley Railway cross-country line into the Karlsruhe tram system between 1957 and 1966 formed the foundation for the later Stadtbahn network. The Alb Valley Railway was connected to the tram system and electrified as a tramway, so that modified trams could run through between the southern outskirts and Karlsruhe city centre.