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
Rhine-Ruhr is characterized by having the warmest winters in Germany, especially its western part at the Lower Rhine area. Classified by Köppen-Geiger climate classification to be oceanic (Cfb). The area has four international commercial airports, and multiple smaller aerodromes for general aviation. North Rhine-Westphalia has the densest network of Autobahns in Germany. The rail, S-Bahn, U-Bahn and bus companies are administered through a consortium of local and regional transport lines, the "Verkehrsverbund Rhein-Ruhr". It offers a rapid transit system which interconnects all cities and their respective local buses, trams, U- and S-Bahn systems, partly under the umbrella of Deutsche Bahn. Their