Sorry, I just re-read your post, I guess I misunderstood what you needed.

I'm not sure what you mean exactly by "track movements" but I can probably help you.
You can track movements by either having invisible block and when the car hits them your next instruction appears.
or you can use variables that increase or decrease as the car moves forwards or backwards
and your instructions appear when the variable reaches a certain value.
If that's not what you mean please tell em what you need. Hope that I can help
Rtsgamer706