I WAS S/B ON I-75 IN KENTUCKY AT APPROXIMATELY THE 56 MP WHEN I FELL ASLEEP. THE FRONT END STRUCK THE END OF A GUARD RAIL AND THEN THE CAR SWUNG AROUND, SLID SIDEWAYS, AND ROLLED OVER STOPPING ON IT'S LEFT SIDE. NO AIR BAGS DEPLOYED. THE VEHICLE HAD BOTH FRONT AND SIDE AIR BAGS. THE KENTUCKY STATE POLICE, POST 11, TOOK THE REPORT AND THE MOUNT VERNON, KY FIRE DEPARTMENT GOT US OUT. NO WAS INJURED THANKS TO SEAT BELTS BUT THE AIR BAGS SHOULD HAVE DEPLOYED. THE FIRE DEPARTMENT WAS CONCERNED THAT THE SIDE AIR BAGS WOULD DEPLOY WHEN THEY USED THE 'JAWS' TO CUT THE SIDE POSTS BUT THIS DID NOT HAPPEN EITHER. *TR