The HzL won the contracts for operations for both the periods of 2006–2008 and of 2009–2023.
Until 2008 three NE 81 sets formerly operated by Bodensee-Oberschwaben-Bahn were used as an interim solution.
Since they have been replaced by new Regio-Shuttle diesel multiple units (and the NE 81 sets were transferred to Südwestdeutsche Verkehrs-Aktiengesellschaft).
Traffic is controlled from the HzL Ringzug (ring train) operations centre in Immendingen, where the railcars are also maintained.
At peak times on weekdays services operate every half-hour between Radolfzell and Stockach.
Outside the peaks and on weekends trains operate hourly, with convenient connections in Radolfzell towards Konstanz (Constance) and Singen, with generally poorer connections to the hourly services to Friedrichshafen.

In November 2008, all level crossings in Stahringen and Wahlwies were rebuilt and adapted to modern standards.
The HzL won the contracts for operations for both the periods of 2006–2008 and of 2009–2023. Until 2008 three NE 81 sets formerly operated by Bodensee-Oberschwaben-Bahn were used as an interim solution. Since they have been replaced by new Regio-Shuttle diesel multiple units (and the NE 81 sets were transferred to Südwestdeutsche Verkehrs-Aktiengesellschaft). Traffic is controlled from the HzL Ringzug (ring train) operations centre in Immendingen, where the railcars are also maintained. At peak times on weekdays services operate every half-hour between Radolfzell and Stockach. Outside the peaks and on weekends trains operate hourly, with convenient connections in Radolfzell towards Konstanz (Constance) and Singen, with generally poorer connections to the hourly services to Friedrichshafen.
In November 2008, all level crossings in Stahringen and Wahlwies were rebuilt and adapted to modern standards.
Radolfzell–Mengen railway