The Düsseldorf–Solingen railway is a railway in the German state of North Rhine-Westphalia. It is a 19 kilometre line, entirely double track and electrified with overhead line. It is now used by the S 1 of the Rhine-Ruhr S-Bahn and Regional Express service RE47, operated by Regiobahn.

The Troisdorf–Mülheim-Speldorf railway is the main axis for freight between Cologne and the Ruhr area in Germany and the Netherlands. It connects the marshalling yards of Duisburg-Wedau and Gremberg.