VEHICLE PULLED TO THE LEFT WHILE ON FREEWAY THEN WENT INTO DIRT MEDIAN TRIED TO GET IT BACK ON THE FREEWAY AND IT STARTED ROLLING WENT ACROSS THE FREEWAY AND DOWN A STEEP EMBANKMENT. AIRBAGS DID NOT DEPLOY. VEHICLE WAS HARD TO STEERING AT SPEED LIMIT (75 IN AZ). PULLED TO THE RIGHT AND LEFT. ROOF SMASHED DOWN, I COULD BARELY CRAWL OUT OF THE BACK OF THE VEHICLE. VEHICLE IS A HAMILTON TOWING, BUCKEYE, AZ