esafzay do you want more than that ?
[EDIT] if you don't want the car to move back on the track, one option is to to Pin (in rope stile) an invisible large sprite behind the car (like a trailer), and when the car go back and hits the trailer you stop it from moving. 2-nd option is to make segments on the track itself, each having an instance variable with an ascending value. car is holding the segment value that is passing on and if the segment value is smaller than stop the car.
capx