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 the south and the small city Wesel as its northernmost point. The northern border is similar to the border of the Ruhr Area. The table below shows an unofficial summary of regions. In the official definition the metropolitan area is much smaller. Eurostat's "Urban Audit" splits the Rhine-Ruhr region into six Larger Urban Zones (LUZ). These six Urban Zones do not cover the cities of Remscheid and Solingen nor the district of Rhein-Kreis Neuss. Historically, most of the Ruhr area was for the most part characterized by heavy industry since the age of industrialisation in the late 19th and early