I don't want to sound overly harsh.... But what if any is the benefit of car steering?
I mean, you realize that this game isn't really as simple as "Go straight and turn left" it will take a great deal of maneuvering to pick up and hurdle a track ball (which I assume you are trying to do).
Just imagine trying to make a five-point turn every time you want to pick up your ball
I don't think this game will really resemble a race, I think it will look more like a game of "territories" with robot progressing through the "territories" in a counterclockwise direction.