11.9 end of operating round/export train
At the end of each set of operating rounds, a 2-train, 3-train, or 4-train is exported. Remove the topmost train from the stack of available trains from the bank from the game.
The sheet currently exports a train at the end of every Operating Round, not every set of them.
According to the rules (11.9):
The sheet currently exports a train at the end of every Operating Round, not every set of them.