FELL ASLEEP DRIVING 2007 KIA RIO ON THE INTERSTATE TO ARMY RESERVE TRAINING (TRAVELING 65 MPH). CAR HIT - HEAD ON - THE UPCOMING END OF A GUARD RAIL WHICH DROVE THE RADIATOR BACK INTO THE ENGINE. NEITHER FENDER GOT DAMAGED. HAD SEAT BELT ON AND HIT HEAD ON STEERING WHEEL; CUT HEAD; CONCUSSION; DISLOCATED PART OF HAND. THE AIRBAG DID NOT DEPLOY. UNCONSCIOUS FOR OVER AN HOUR. THE HIGHWAY PATROL WAS CONCERNED THAT THE AIRBAG DID NOT DEPLOY BUT THE GUY REBUILDING THE CAR (3 HOURS FROM US; $7000 WORTH OF DAMAGE) SAYS IT DIDN'T NECESSARILY NEED TO DEPLOY BECAUSE THERE ARE ONLY 2 CENSORS AND BOTH CENSORS MUST TRIGGER TO DEPLOY. HOWEVER LOCAL MECHANIC SAYS THERE ARE 4 CENSORS AND ANY ONE OF THEM WILL DEPLOY THE AIRBAG. HAVE BUMPER TO BUMPER WARRANTY ON THE CAR FROM THE DEALER WHERE BOUGHT IT USED. *TR