In this suggestion, I am suggesting the line from Köln Hbf to Siegen Hbf, it travels via Köln Messe/Deutz, Troisdorf, Seigburg/Bonn and Au (Sieg)....
Hello, here are some ideas to extend the already existing lines (New Itinerary). 1.Ruhr Sieg Nord extend it to Siegen Hbf so that this line...
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