TL*THE CONTACT OWNS A 1998 TOYOTA AVALON. THE CONTACT DROVE ONTO THE EMERGENCY LANE AND PUT THE VEHICLE IN THE PARK POSITION. WHEN THE CONTACT PROCEEDED TO DRIVE, THE VEHICLE'S SPEED SUDDENLY AND INDEPENDENTLY INCREASED UP TO 45 MPH CAUSING THE VEHICLE TO HIT THE CURB AND FLIP OVER. THE CONTACT SUFFERED A BROKEN ARM AND A SHOULDER AND HEAD INJURY AS WELL AS INJURIES TO HER KNEES. THE CONTACT WAS TRANSPORTED TO THE EMERGENCY ROOM. THE MANUFACTURER WAS NOT NOTIFIED. THE CONTACT WAS CONCERNED THAT AN INVESTIGATION WAS NOT OPEN ON LATE MODEL TOYOTAS. THE FAILURE MILEAGE WAS 150,000.