The combined solution in Karlsruhe – decided in 2002 by a referendum – comprises 2.4 km of tram tunnel under Kaiserstraße, 1 km at the southern branch into Ettlinger Straße as well as the conversion of Kriegsstraße with 1.6 km of tram tunnel and new tram line above this tunnel. The relocation of the trams will relieve the strain and a new cityscape will be created. SÜLZLE Stahlpartner is supplying around 19,000 tons of reinforcing steel for this major project, which in turn will be laid by SÜLZLE Armierungstechnik.