WHILE SLOWING DOWN ON INTERSTATE HIGHWAY, VEHICLE RAMMED INTO VEHICLE IN FRONT OF IT. ALL THE DAMAGE WAS TO THE FRONT OF THE VEHICLE AND THE VEHICLE WAS DRIVABLE AFTER THE COLLISION. DURING THE COLLISION THE PASSENGER AIR BAG DEPLOYED WHILE THE DRIVER'S AIR BAG FAILED TO DEPLOY. THERE WAS NO PASSENGER IN THE CAR.