It also occurred to me that if you drive a train on the S-Bahn route from Düren to Cologne, you have to wait for a red signal in front of Sindorf.It is clear why you wait in front of a red signal because a train is in front of you. If a train comes from Cologne and wants to leave Sindorf, it cannot do that because it is waiting for a green signal for unknown reasons. I've only experienced that in my own scenario, otherwise with the timetable mode I don't know what it's like, but I'll try it out. EDIT: Strangely, it works in timetable mode