S1 (Rhine-Ruhr S-Bahn) Services ran via Düsseldorf Airport Terminal station from 24 May 1998 to 28 May 2000. Services were extended from Düsseldorf to Solingen on 13 December 2009, replacing part of the former line S 7 service. S1 (Rhine-Ruhr S-Bahn) Line S1 is a S-Bahn line on the Rhine-Ruhr network. It is operated by DB Regio. It runs from Dortmund west over Essen to Duisburg. From there it travels south to Düsseldorf and Hilden before continuing to Solingen. It is operated at 20 minute intervals, using coupled sets of class 422 four-car electrical multiple units. Line S 1 runs over lines built
Upper Ruhr Valley Railway Upper Ruhr Valley Railway The Upper Ruhr Valley Railway () is a 138-kilometre-long, non-electrified line from Schwerte (Ruhr) station) through the Hochsauerland (high Sauerland) to Warburg in the German state of North Rhine-Westphalia. It is the most southerly of the east-west lines that run from the Ruhr to eastern Germany and it connects the rural Hochsauerlandkreis with the Ruhr. The line is included in the German railway timetable as line 435, which continues on the line from Schwerte to Hagen, which is part of the Hagen–Hamm railway. The Upper Ruhr Valley Railway is named after the Ruhr valley, which it