DRIVING ON U.S 23 IN MICHIGAN, TRYING TO SLOW DOWN FROM 55 MPH TO 35 DUE TO APPROACHING AU GRES, MICH. COULD NOT SLOW DOWN, STARTED WEAVING IN AND OUT OF TRAFFIC TO AVOID CARS THEN TURNED OFF ENGINE, TOOK CAR OUT OF GEAR, CAR KEPT GOING. THE ONLY WAY THE CAR COULD BE STOPPED WAS TO HIT A TREE. THE CAR WAS TOTALED. THE AIR BAG DID NOT DEPLOY. *TR