MY SON HAD DIFFICULTY BRAKING WHEN A CAR IN FRONT OF HIM STEPPED ON HIS BRAKES TO AVOID HITTING A CAR IN FRONT OF HIM. CONSEQUENTLY, MY SON HIT THE CAR IN FRONT OF HIM CAUSING BUMPER DAMAGE TO THAT CAR, A TOYOTA. MY SON'S CAR WAS TOTALED DUE TO THE IMPACT. ALSO, THE DRIVER AND PASSENGER AIRBAGS DID NOT DEPLOY. HE WAS DRIVING ON INTERSTATE 85 AT LESS THAN THE POSTED SPEED LIMIT.