CAR DRIVING40 MPH ON STRAIGHT, WET, CEMENT TERRAIN, DURING DAYLIGHT HOURS. DRIVER ATTENTIVE WITH HANDS AT 10 & 2 POSITION BEGINNING TO ACCLERATE. BACK WHEELS OF VEHICLE BEGIN TO SHIMMY, SHAKE. FRONT OF VEHICLE BEGINS TO VEER LEFT. DRIVER STEERS CAR AWAY FROM CEMENT EMBANKMENT, LEFT TIRE GOES SLIGHTLY UP EMBANKMENT, NO COLLISION. CAR STRAIGHTEND OUT, DRIVER BEGINS TO ACCLERATE AGAIN CAR VEERS SHARP RIGHT HITS EMBANKMENT HEAD ON, VEHICLE DOES COMPLETE ROLLOVER. TIE ROD COMPLETELY SEVERED. BOTH TIMES CAR VEERED DRIVER ATTEMPTED TO CORRECT CAR, BUT UNABLE TO STEER VEHICLE.*AK