Consider this situation, all signals are Path-signals: Obviously, it would have been more efficient if the first departing train would have reserved the bottom track. What happened is that the first train actually broke down, blocking the other.
Also, the reverse happens. Both trains are coming from the right side of the picture, each reserving their own track, and it only messes up at the last signal, where the train on the upper track reserves the lower platform, thus completely stopping the other train.
Is there any way of making sure this doesn't happen?