LAST WEDNESDAY MORNING ANOTHER CAR REAR ENDED MY SIENNA AT HIGH SPEED AT STOP SIGN WHILE I WAS WAITING FOR MY TURN TO PROCEED. I WAS TRAVELLING WITH MY FAMILY. SIENNA GOT TOTALED DUE TO THIS. SIDE DOORS, BACK DOOR, BACK BUMPER, CARGO AND THIRD ROW SEAT AREA ALL GOT IMPACTED DUE TO THIS AND EVERYTHING CAVED INWARD BY FEW INCHES. MY ENTIRE FAMILY HAS BEEN SHAKEN TO THE CORE AND ME AND MY WIFE ARE SUFFERINGS FROM SEVERE PAIN IN BACK AND NECK SINCE THE ACCIDENT. THE CABIN WAS FILLED WILL WHITE SMOKE (POWDERY STUFF), BUT NO AIR BAGS GOT DEPLOYED (OPENED) DUE TO THE IMPACT. WE ARE LUCKY THAT WE ALL ARE STILL ALIVE SINCE WE HAD BEEN HIT FROM THE BACK AT HIGH SPEED. THE CAR HITTING US FROM THE BACK MUST BE TRAVELLING ABOVE 40 MILES AN HOUR SINCE MY FULLY LOADED SIENNA WITH 3 ADULTS AND A CHILD SKID FORWARD BY ALMOST 8-10 FEET. THIS IS A SERIOUS CONCERN THAT EVEN AFTER SUCH A HIGH IMPACT COLLISION, NONE OF THE AIR BAG OPENED. THE VEHICLE WAS STATIONARY, ON A HIGHWAY AT A STOP SIGN (RIDGE RD AND ROUTE 52 JUNCTION IN KENDALL COUNTY, IL). I HAVE ATTACHED THE POLICE REPORT AND ALSO THE REAR OF MY CAR. IT RENDERED MY CAR UNDRIVABLE AND I HAD TO GET IT TOWED TO THE GARAGE.