I WAS INVOLVED IN A SINGLE CAR, WEATHER RELATED ACCIDENT. I WAS TRAVELING APPROXIMATELY 35-40 MILES PER HOUR IN HEAVY SNOW. I WAS WEARING MY SEATBELT WHICH CAME UNLATCHED UPON INITIAL IMPACT WITH A GUARD RAIL ON THE REAR PASSENGER SIDE. MY CAR THEN CROSSED THE ROAD AND WENT INTO A DITCH, STRIKING SOME LARGE BOULDERS. THAT IMPACT WAS ON THE FRONT, DRIVER SIDE OF THE VEHICLE. THE AIRBAG DID NOT DEPLOY AND THE CAR WAS SIGNIFICANTLY DAMAGED AND DECLARED A TOTAL LOSS. I WAS INJURED WITH A BROKEN RIGHT ARM, BROKEN RIGHT LEG, NINE BROKEN RIBS AND SIGNIFICANT LACERATIONS TO MY HEAD AND RIGHT EAR FROM IMPACTING THE REAR VIEW MIRROR AND FRONT WINDSHIELD. I SPENT 12 DAYS IN A CRITICAL CARE UNIT AND 18 DAYS IN A REHABILITATION CENTER FOR PHYSICAL THERAPY. I HAD TO HAVE PLATES AND SCREWS INSTALLED IN MY LEG AND ARM TO REPAIR THE BROKEN BONES. MY HUSBAND INSPECTED AND TESTED THE DRIVER SEATBELT AND WHILE IT DID APPEAR TO HOLD ON SOME SOLID LATCHES OF THE BELT, WAS ABLE TO OBSERVE IT FAIL AND COME UNLATCHED AFTER HEARING A SOLID CLICK/LATCH SOUND AND THEN PULLING WITH HAND STRENGTH ON THE BELT HAVING IT COME UNLATCHED.