LEFT REAR TIRE BLEW OUT ON HIGHWAY AT 70MPH, DRIVER LOST CONTROL OF VEHICLE AND IT FLIPPED AND ROLLED MULTIPLE TIMES. PASSENGER AIR BAG DEPLOYED (NO PASSENGER IN VEHICLE) BUT DRIVER AIR BAG FAILED TO DEPLOY. DRIVER HAD BROKEN BONES, CUTS AND ABRASIONS. DEPLOYMENT OF DRIVER AIR BAG WOULD LIKELY HAVE REDUCED INJURIES TO DRIVER. *TR