bulk of long-distance trains. This resulted in a trip time of 1 hour and 44 minutes between Stuttgart and Singen. The Cisalpini were responsible for the traffic between Stuttgart and Milan, while the ICE trains carried the load between Stuttgart and Zurich; the through traffic between Stuttgart via Genoa to Naples was eliminated. In 2005, the last locomotive-powered express train, the so-called IC Insubria, was also removed. One year later, in December 2006, the Cisalpino service was stopped, eliminating direct connections to Italy, and making the ICE the only long-distance carrier on the Gäubahn. Alterations in local service were just as deep as in the case of long-distance travel. On 5 December 1992, the S1 line of the Stuttgart S-Bahn was expanded to Herrenberg, which improved local service between the Gäu and the state capital. In 1994, the Seehas started service on the Gäubahn. This service, which travels between Engen and Singen, was initially managed by the Swiss company Mittelthurgaubahn, due to the lack of suitable DB AG-trains. In 2003, a sizable improvement of local service came about with the establishment of the Ringzug service, which traverses the Gäubahn between Tuttlingen and Rottweil. A commonality between these new local service offerings is the addition of frequently stopping local trains to the express service offerings, which restarted service to the small communities on the Gäubahn. To accommodate this service, DB Station&Service reactivated many closed stations and halts, and built a number of new halts on the line. Operations Long-distance traffic Long-distance service on the Gäubahn in 2009 involves 7 ICE-T trains between Stuttgart and Zurich, running every other hour. A single ICE extends northwards through Stuttgart to Frankfurt am Main. The InterCityExpress service stops at Stuttgart Hbf, Horb am Neckar, Rottweil, Tuttlingen, and Singen; Böblingen, which had been a stop on the long-distance routes for decades, is not served. Starting in December 2006, the 7-car ICE-T of class 411 replaced the 5-car configuration of the class 415, and this service is guaranteed until 2011. At that time, Deutsche Bahn AG will reconsider options in long-distance traffic on the Gäubahn. Regional traffic In addition to the ICE trains, Regional-Express (RE) trains traverse the Gäubahn between Stuttgart and Singen, also every other hour. Another set of Regional-Express trains serve the section between Stuttgart and Rottweil, and these trains are separated in Eutingen. Going south, the trains from Stuttgart are split into two halves,