In the transition state trains are moved from the large or small CW figure-eight path assigned in the starting state (2) to the path assigned during the stopped (0) or idle (1) state.
Following the rules for changing paths, a train can switch from a CW figure-eight to either a CW or CCW oval. And from an oval back to a CCW figure-eight. In this way all trains are moved to the final assigned path and are ready for the Run state (4).
If there are two trains on a given level, large or small, and the figure-eight train needs to run CCW care must be taken that when both trains are switched to the oval path that they are both going in the same direction.
As soon as all trains are following their configured path in the desired direction the simulator state is advanced to the Run state (4).