Badische Hauptbahn
By cutting straight through the Black Forest, the Black Forest Railway shortened the trip between Offenburg and Singen, which had been connected by the Baden Mainline ("Badische Hauptbahn"), from 240 km to 150 km. The route is currently operated by a regular service of Deutsche Bahn "RegionalExpress" trains, using double-decker rolling stock, which allow excellent views. The trains continue southwards from Singen on the High Rhine Railway to Konstanz and across the Swiss border to Kreuzlingen, and northwards to Karlsruhe along the Rhine Valley Railway. In addition, the line is utilized by a daily "Intercity" between Konstanz and Hamburg-Altona.