DRIVING ON I-89 S. AT 50 MPH WHEN SNOW STORM TURN INTO A WHITE OUT WHEN I CAME UPON A STATE PLOW TRUCK IN PASSING LANE DOING 25 MPH AND BY TIME I SAW IT'S FLASHING LIGHTS I COULDN'T STOP AND AIR BAG FAILED TO DEPLOY CAUSING ME BANG MY HEAD ON DOOR POST, MY LEFT RIBS INTO STEERING WHEEL CRACKING THEM AND MY RIGHT KNEE INTO 4 WHEEL DRIVE LEVIER AND DASH CAUSING IT TO BE CRACKED. *TR