page_title: Ulm–Sigmaringen railway
section_title: Passenger service
hierarchical_section_title: Ulm–Sigmaringen railway / Operations / Passenger service
caption_attribution_description: English: Ringzug train in Rottweil
context_page_description: The Ulm–Sigmaringen railway is a 92.670-kilometre-long railway in Baden-Württemberg in south-western Germany, which is largely single-tracked and for the most part not electrified. It runs from Ulm via Blaubeuren and Riedlingen to Sigmaringen mostly in the valley of the Danube. The line is part of the once important long-distance connection from Munich to Freiburg im Breisgau.
  It forms part of the Danube Valley Railway of Baden-Württemberg. The line is famous especially for its charming course through the Upper Danube Nature Park, and is particularly attractive to bicycle tourists. The Royal Württemberg State Railways built the line as part of the railway projects undertaken between 1865 and 1873. Since 1901, the Danube Valley Railway, together with the Höllentalbahn, form part of the pan-regional railway link from Ulm to Freiburg im Breisgau.
context_section_description: Today, service runs every two hours in the form of RegionalExpress (RE) trains between Donaueschingen and Ulm, and this service further takes the Höllentalbahn to Neustadt in the Black Forest.  Another set of trains, running every two hours on a schedule in between the first service, travel between Sigmaringen and Ulm, which means trains once an hour on the section between Sigmaringen and Ulm.  In the section between Ehingen and Ulm, additional RegionalBahn trains run every hour, boosting service on this section yet further to two trains per hour.  These RB trains travel on from Ulm via the Illertalbahn to Memmingen.  Similar service is provided between Herbertingen and Sigmaringen, where, in addition to the hourly trains Neustadt-Ulm and Sigmaringen-Ulm, on the section between Sigmaringen and Aulendorf, hourly trains on the Zollernalbbahn further boost service.
  On the section between Immendingen and Fridingen, the Donautalbahn was integrated into the Ringzug network.  Trains of the Hohenzollerische Landesbahn travel between Rottweil and Tuttlingen on the Gäubahn (Stuttgart–Singen), then on the Donautalbahn to Immendingen, and further on the Wutach Valley Railway to Zollhaus-Blumberg.  Under the week, this service is provided hourly, and every two hours on weekends.  Between Fridingen and Tuttlingen, train schedules are not synchronized, and individually scheduled trains operate, with no service on weekends on that section.  Between May and October, this section is used on the weekend by the Naturpark-Express, which travels between Sigmaringen, Tuttlingen, and Blumberg, and has additional capacity to carry bicycles.
  Between Immendingen and Donaueschingen, the service provided every two hours by the RE trains between Neustadt and Ulm is boosted by service provided every two hours by trains on the Schwarzwaldbahn (Baden) between Konstanz and Offenburg, which results in hourly service on that section.  Except for the Ringzug trains and the Naturpark-Express, which are operated by the Hohenzollerische Landesbahn, all other service is provided by subsidiaries of the Deutsche Bahn AG.  The top speed for long-distance trains from Neustadt to Ulm is still under 70 km/h, and has not improved in recent times.
caption: A Ringzug train in Rottweil
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