TRAVELING AT HIGHWAY SPEED, TRAFFIC SLOWED. AS TRAFFIC WAS SLOWING AND I WAS BRAKING TRAFFIC CAME TO A SUDDEN STOP. I WAS MAINTAINING MY NORMAL FOLLOWING DISTANCE, YET THE VEHICLE SEEMED TO TAKE A LONGER DISTANCE THAN NORMAL TO STOP. I IMPACTED THE VEHICLE IN FRONT OF ME HARD ENOUGH TO BEND THE FRAME, YET THE AIR BAG DID NOT DEPLOY.