AT 65 TO 70 MILES AN HOUR ON STRAIGHT INTERSTATE CAR BEGAN TO STEER IRRADICALLY TO RIGHT. NO RESPONSE TO WHEEL CORRECTION, FISH TAILING, STRUCK ONE SIDE CONCRETE WALL AND CROSSED ROAD TO LEFT GUARD RAIL. BRAKES TRIED AT LEAST TWICE WITHOUT RESPONSE AND CORRECTION OF WHEEL AFTER FIRST HIT DID NOT CORRECT DIRECTION. AIRBAGS DEPLOYED FRONT AND RIGHT SIDE AFTER FIRST HIT AND PERHAPS ONLY ON SECOND. NO SIGNIFICANT INJURIES. TOTAL FRONT DAMAGE. SERPENTINE BELT SEEN HANGING UPON REMOVAL OF CAR. TIE RODS AND CV JOINT BOOTS INTACT, BUT TRANSMISSION JUST REPLACED UNDER WARRANTEE AND CV JOINTS ON ORDER FOR WEAR PERHAPS RELATED TO TRANSMISSION BEING "VERY SLOPPY" CREATING FRONT END VIBRATION IN FLOOR AT 50 MILES AN HOUR TO 60 RELIEVED BY PUTTING GEAR INTO NEUTRAL. FEEL STEERING FAILURE PERHAPS RELATED TO SERPENTINE BELT FAILURE.