Signals in Train Fever are working in combination and cooperation with the switches, stations, depots and ofcourse the existing lines you have created by yourself. Many players don’t see how smart and elegant this system works.. its so stupid simple to grasp that it looks hard to get a hang of it. If you understand how the TF signal system works then you also understand that the one way signals placed on the long double track connections works as automated bock signals. In more complicated situations is the relevant switch, not only a switch but also the flawless controller of the relevant exit signal! Thus in passing loops you don’t need a entrance with exit signal combination to create the block protection in the passingloop. Each station platform act as two following signals, placed on both ends and having the station railtrack between. That is the reason why stations but also depots don’t need manually placed exit signals.