The city is very large and spread out over several hills with the city centre in the valley. Subsequently and until 1983 all city tunnels were completed. Therefore some routes still have three rails and stations have either a high and a low platform on different sides or one two-level platform which does not allow the use of longer trains. 22 km are in tunnel with 23 underground stations.
Some stations are in a cut or partly underground.
This train has a special bicycle car so bikers don't have to climb up the steep hill. Projects Regauging of Line 2 started in early 2000 and might be finished by 2002. At the same time it is being extended north to Neugereut. By 2003 also service on metre-gauge Line 15 will be finished although no decision has been taken yet whether to convert the northern section of the line or not. In conjunction with the reconstruction of the Central Railway Station, the Stadtbahn station Staatsgallerie will have to be rebuilt entirely.