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
Ruhr Question prerequisite for the security of Europe and the world." An important consideration was that France and neighboring Western European countries had their economies supplied with coal and steel from the Ruhr and Saar regions for the purpose of postwar reconstruction. In the steel sector specifically, France intended, with the Monnet Plan to expand French steel production and impose a restriction on the capacity of German steel production. The Monnet Plan was considered a compromise from France to the other Allies, as France would have preferred to separate the industrial area from the Rhine and Ruhr region altogether. The Soviet Union,