DRIVING 35 MPH ON GRAVEL ROAD, TURNING CORNER WHEN VEHICLE FLIPPED OVER TWICE. AIR BAGS DID NOT DEPLOY. DRIVER WEARING SEAT BELT. VEHICLE THEN FLIPPED BACK ONTO 4 WHEELS. VEHICLE TOWED TO RENTAL AGENCY DUE TO BEING TOTALED. DRIVER HAS BROKEN RIBS. *AK