The network of the Dortmund Stadtbahn (light rail) has a system length of about 75 kilometres, 20 kilometres run subsurface. It is served by high-floor light rail vehicles, except for the two east-west lines U43 and U44, which are served by low-floor cars. In contrast to most other operators in the Rhine-Ruhr region, there is no connection to the networks of other cities, so that only vehicles of the 'Dortmunder Stadtwerke' run on it, which operate under the brand name → DSW21.

A special feature is the H-Bahn in the west of Dortmund, a suspension railway, which has of two routes: one connects the northern and the southern campus of the university, the other the district of Eichlinghofen with the S-Bahn station Universität and the technology centre.