MY VEHICLE WAS STATIONARY. I WAS REAR ENDED BY A MID SIZE CAR GOING AT LEAST 55MPH. THE VEHICLE DID NOT BREAK BEFORE COLLIDING WITH MY VEHICLE. MY AIR BAGS DID NOT DEPLOY. BOTH MY DRIVERS SEAT AND MY PASSENGERS SEAS BROKE. THE PLASTIC SURROUNDING THE BASE OF MY SEAT WAS DISLODGED AND CRACKED. THE METAL STRUCTURE OF THE SEATS ALSO BROKE. BOTH MY DRIVERS SEAT AND FRONT PASSENGERS SEAT WERE COMPLETELY LAID BACK AND DID NOT RAISE AFTER THE COLLISION. THE SEATS BEFORE THE COLLISION WERE IN THE UPRIGHT POSITION. DUE TO THE AIR BAGS NOT DEPLOYING MY HEAD CONTACTED THE STEERING WHEEL.