Hauptstrecke Rhein-Ruhr = Rhein-Ruhr Mainline Makes sense. Rhein-Ruhr Osten = Rhein-Ruhr East Makes sense. Main-Spessart Bahn = Main-Spessart Train Makes sense. Ruhr Sieg Nord = Ruhr Victory/Triumph North? Doesn’t make sense. Is this the correct translation?
Let me help you with that. Main-Spessart Bahn = Main-Spessart Railway (train can only be used for the German word Zug) Ruhr Sieg Nord = Ruhr Sieg North (Sieg is the name of the area, so there's no translation for it. There's also a river of that name in the area, and a town called Siegen. We can't see that river on the route though.)