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
S28 (Rhine-Ruhr S-Bahn) S28 (Rhine-Ruhr S-Bahn) Line S28 is a S-Bahn line in the Rhein-Ruhr S-Bahn network. It is operated by Regiobahn GmbH, a partnership between the districts of Mettman, Düsseldorf, and Rhein-Kreis Neuss, through which the line runs. The line begins in Mettmann Stadtwald, it runs through Düsseldorf Hauptbahnhof branching off to Kaarst after passing through Neuss Hauptbahnhof. Its western terminus is Kaarster See. The line is operated by Regiobahn GmbH, using Talent DMUs at 20 minute intervals. The state of North Rhine-Westphalia and the districts have been in talks to extend the line east to Wuppertal and west to either Viersen,