How to "force" a move across two turns?

In my car racing game, a player can chooses (or is forced) to do a “180° spin”.
This special move requires to be completed in 2 turns: in the current turn the car spins 90°, during the next turn the player cannot do anything else that finish the spin, by the remaining 90°.

How can i “automate” this move, or at least give to the player no other option than the “continue the spin” one?