I\'ve ridden the Ford Motor Co test track in Dearborn, MI and that track is real

Question

I've ridden the Ford Motor Co test track in Dearborn, MI and that track is really interesting. If you enter the track and bring the car up to 80 MPH the car moves to a middle lane and it is possible to complete a circuit of the track in that lane without any hands on the steering wheel. Kick it to 90 and the car moves to the next lane (toward the outside of the track) and still requires no hands. The same is true at 100 MPH - it moves further to an outside lane and requires no hands to guide the vehicle. How do you suppose that can be?

Explanation / Answer

to stay in a circle friction = mv^2/r

friction wont change at higher speeds but if you increase v, r will have to incraese

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