SML Shiftback

It has been a while since this idea came in my mind. I experimented to find a better way managing the train flow. The main idea of the SML concept is to shift trains to other tracks if they are free and joining trains use this free track. If the track is not free, the others aren’t either. This works very well but has a disadvantage too: train’s entering a station will primarily enter via the shift-tracks (the innermost).
SML Sketch
That’s the point where “shiftback” comes into play.
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