Donautalbahn
In 2012, Ulm Hauptbahnhof is served in regional transport by Interregio-Express, Regional-Express and Regionalbahn services operated by DB Regio and by services operated by private operators. Ulm is a hub in Baden-Württemberg's Inter-Regional Express network. Its IRE trains from Stuttgart and Ulm operate to Lindau ("Südbahn") and from Ulm to Basel ("IRE-Sprinter") on the Ulm–Friedrichshafen railway, from Ulm to Aalen on the Aalen–Ulm railway and from Ulm to Neustadt (Black Forest) on the Ulm–Sigmaringen railway, Tuttlingen–Inzigkofen railway, Black Forest Railway and Höllentalbahn (most of this route is known as the Danube Valley Railway or "Donautalbahn"). With the exception of the connection to Lindau, which is operated hourly, each service runs every two hours. Services are operated with electric locomotives of class 146 or diesel locomotives of class 218, hauling double-deck coaches and class 611 diesel multiple units.