Have any of you ever heard of the new adaptive cruise control that they are putting in luxury cars/busses?
Basically you set the maximum speed that you want to go, and it will adjust the speed below that point to remain a safe distance behind cars in front and will slow down to make turns. It detects vehicles in front through video cameras or in the more expensive versions radar. It also has a yaw sensor that detects whether or not the vehicle is turning.
Its a more complex system, but it would be really *really* cool if you made it work. =) I guess there are also many more possible points of failure, but its a neat idea nontheless.