Rubbin’ is Racin’: DRAFT MOVEMENT—Any lateral movement will cost the Active Car 0 MPs. It is also possible to change more than one lateral lane in a turn and the special move may be used as many times as it is legal and desired.
Lateral move cost 0, but if the lateral space is NOT Free ? The lateral movement cost 0 or 2 ?
Remember that you still can't enter the same space twice. So for instance you cannot use free lateral moves to just push other cars and then return to the original lane and move forward.
Why would you ever enter the same space twice???
As i (maybe not exhaustive enough) explained above, if you WERE allowed to enter the same space twice, you could use the free lateral moves to drive along a line of cars and break up the line or even move them backwards by pushing them and then moving back to continue along the empty lane - rinse and repeat.