Following the acquisition of the line by Regiobahn it was upgraded for S-Bahn operations and all stations were extensively reconstructed and modernised [REF].
Since 26 September 1999, the Rheinisch-Bergische Eisenbahn-Gesellschaft has operated line S 28 of the Rhine-Ruhr S-Bahn-initially every hour, but from 28 May 2000 at 20-minute intervals-from Kaarster See via Neuss Hbf, Düsseldorf Hbf and Neanderthal to Mettmann Stadtwald [REF].