The problem is created by wrong lay out design, not the lack of way points or bugs. Based on what the TS has tried to achieve I have created an example of a crossover with a depot connection. The design is working as a flawless running Swiss timepiece. The depot is drive-able from the four tracks by trains running from East to West before the have passed the cross over switches. For creating lines all the four tracks are guided by one way signals.
Remember, a one way signal is only passable by trains driving to its front side, trains can not pass a one way signal from the back side. A two way signal controls only the train traffic that is driving to its front side but two way signals allows trains that they pass the signal also from its back side. With the one way signals you create one way traffic flow, two way signals allows the trains to drive on the track in both directions.
One way signals are meant to block line traffic flow into unwanted tracks. thus plays an important role in your route setting. Also notion that the signals you place manually act as entrance signals, allowing trains to ENTER a part of the line route. The invisible by the a.i. placed signals act in Train Fever as exit signals. these exist at the station platform ends, the depot exit track and on the three switch tips too. The manually placed entrance signals co-operate with the automatically by the a.i. placed exit signals. Not knowing this and not realizing how simple but refined the TF route guidance works is the main reason of frustrations and complains. I find out that we even don’t need an additional way point tool if the working of the Train Fever signalling system is fully fathomed.
As you can see on the picture below, two double track lines (the red and green line) are joining at the cross over and use further to the west together the double track railroad. At double tracks trains drives in my lay out on the right side. As you can see are all trough going tracks protected by one way signals. Only the depot track is bi-directional and there is no entrance signal to the cross over placed there, making that in the lay out the depot track itself belongs also to the cross over section, resulting that traffic driving from and to the depot is protected by cross over entrance signals A and B and also by signal C if a from east to west driving green train is moving towards signal C. There is one green and one red track that allows route setting form west to east and there is one green and one red track that allows route setting from west to east. The crossover makes it possible that all the trains that are coming from the east can enter the depot track, all trains in the depot set to the red or green line can leave the depot into eastern direction to enter at cross over switch A the red or green route.
To achieve a flawless working crossover it must by protected by proper placed entrance signals for train traffic coming from all possible directions, as in the real world too. The principal part of the crossover protection is done by signal A and Signal B, these signals co-operates with cross-over switches A and B. On the green line is signal C protecting the cross over of the green trains driving over the cross over from west to east. Signal C stops a from east to west driving train if an opposing green train has passed signal A until that train (driving over the cross over) drives with its last wagon over switch C. Thus at the moment that the last wagon of the from west to east driving green train drives over switch C, signal C gives the stopped train there the clearance to start moving. This is how in Train Fever the signals co-operate with the relevant switches, the invisible contact senors that exist in the switches controls the lights of the relevant manually placed signals.
