This is my interpretation of the layout. I made a GIF to help explain. In regards to the ability for the layout to be run forwards and backwards: if the train leaves the station travelling forwards, and performs this exact layout every single time, then the train will always re-enter the station travelling forwards.
If however, they choose to program the ride to do the green/red loop twice then you'll get the train re-entering the station alternating backwards/forwards. The choice to do the green/red loop an infinite number of times (as others have stated already) is the beauty of this new mechanism and layout. You could potentially run a longer cycle during off-peak, and the shorter cycle on-peak.