Verkehrsverbund Mittelsachsen (Mid-Saxony transport association) apply. Since beginning of 2012, the service has been hauled by a class 145 locomotive. As of the end of October, a circuit was operated by a Bombardier Talent 2 set on staff training and since 1 January 2013 all circuits have been scheduled to be hauled by class 143. Other railway lines in the area of the S-Bahn Regional-Express Various Regional-Express lines run from Dresden Hauptbahnhof to Chemnitz (via Freital, Tharandt), Cottbus and Hoyerswerda (via Cossebaude, Coswig and Ruhland) and Elsterwerda, with some stopping at Dresden stations (Dresden-Friedrichstadt, Dresden-Cotta, Cossebaude among others) on the Berlin-Dresden railway, which is not included in the Dresden S-Bahn network. The Trilex Express runs from Dresden Hauptbahnhof to Görlitz or Zittau (via Klotzsche, Radeberg). When there are good conditions for winter sports, two additional trains run through the Eastern Ore Mountains (Osterzgebirge) to Altenberg. In addition, a Regional-Express runs from Dresden Hauptbahnhof via Heidenau and Pirna to Děčín in the Czech Republic. Regionalbahn services Trilex Regionalbahn services towards Görlitz and Zittau have formed the local services corresponding with the Trilex-Express services between Dresden and Bischofswerda since the timetable change in December 2008 (then still operated by DB Regio Südost). These operate at approximately half-hour intervals and provide an S-Bahn-like service on these diesel-powered lines. Two other services are operated into Upper Lusatia (Oberlausitz) by the Städtebahn Sachsen and connect Dresden with Kamenz and Königsbrück hourly. Another service runs from Heidenau (connecting to S-Bahn lines S 1 and S 2) through the Müglitz valley to Altenberg. The Heidenau–Altenberg and the Pirna–Neustadt (Sachs)–Sebnitz–Bad Schandau services are also operated by Städtebahn Sachsen. Due to the re-commissioning of the Rumburk–Sebnitz railway between Dolni Poustevna and Sebnitz, which had been interrupted since 1945, a passenger service operated by the Czech Railways with Deutsche Bahn's Desiro railcars and classified by Deutsche Bahn as U 28 – Nationalparkbahn (“National Park Railway”) runs from Rumburk (Czech Republic) via Sebnitz and Bad Schandau to Děčín (Czech Republic). Since then, Städtebahn Sachsen has operated the Sebnitz–Bad Schandau and return services only once a day. Narrow-gauge railways Two narrow-gauge railways connect the S-Bahn network to two nearby 750 mm gauge railways. In Radebeul Ost (connection to S 1), it is possible to change to the Radebeul–Radeburg railway (Lößnitzgrundbahn). In Freital-Hainsberg (connection to S 3) there is interchange with the Weisseritz Valley Railway (Weisseritztalbahn), which was put out of operation by