UPON DRIVING ON THE HIGHWAY THE LEGAL SPEED LIMIT IS ALWAYS 70MPH. WHILE FOLLOWING THE FLOW OF TRAFFIC INDIVIDUALS AHEAD OF ME STARTED SLOWING DOWN TO A CRUISE SPEED OF 40-50MPH ABRUPTLY. WHILE PAYING ATTENTION TO THE CHANGE IN PACE I SLOWED DOWN AS WELL TO FEEL COMFORTABLE WITH THE FLOW OF TRAFFIC. WHEN CHECKING MY REARVIEW MIRROR TO SEE IF THERE WAS A OPENING TO CHANGE LANES I NOTICED A FORD TRUCK COMING FROM BEHIND AT A EXCELLED PACE. WITH SECONDS BEFORE THE CONTACT I BRACED MYSELF FOR THE WRECK. WITHOUT PAYING ATTENTION SUDDENLY THE DRIVER FROM BEHIND RAN INTO MY REAR OF MY CAR. THIS IMPACT NOT ONLY SHATTERED MY ENTIRE REAR WINDOW, BUT MY TRUCK CAVED IN, BOTH MY TAIL LIGHTS WERE KNOCKED OUT, AND I WAS KNOCKED INTO THE NEXT FAR RIGHT LANE. DURING THE IMPACT I BRACED MYSELF AND HIT THE STEERING WHEEL, MY DRIVER SIDE REAR MIRROR WAS KNOCKED DOWN AND THE HAZARD WHEEL ALIGNMENT LIGHTS CAME ON. WHILE ALL OF THIS OCCURRED I WAS SHOCKED MY DRIVER SIDE AIRBAG DIDN'T EMPLOY. I AM A MALE, 5?8, 160 POUNDS SO I AM SURE THE ELECTRONICS COULD TELL A PERSON WAS VISIBLY IN THE SEAT. HAD I NOT SEEN THE TRUCK COME FROM BEHIND I COULD'VE BEEN THROWN OUT THE WINDOW. I AM SURPRISED OF THE MALFUNCTION AND WANTED TO REPORT IT. *TR