MY PREGNANT FIANCE, HER 3YR OLD SON AND I WERE DRIVING ON A CITY STREET APPROXIMATELY 35MPH. A VEHICLE CUT OFF THE TRUCK IN FRONT OF ME AND THE TRUCK IN FRONT OF ME SLAMMED ON THEIR BEAKS, WHICH MADE ME SLAM ON MINE. I SLAMMED ON MY BREAKS AND IT DID NOT STOP MY VEHICLE, I TRIED TO USE MY EMERGENCY BREAK AND DID NOT STOP THE VEHICLE SO I SWERVED OVER AS MUCH AS POSSIBLE TO AVOID MY FIANCE'S PASSENGER SIDE FROM BEING HIT. I REAR ENDED THE TRUCK IN FRONT OF ME. EVERYONE SEATBELTS LOCKED EXCEPT MY FIANCE'S. SHE HIT THE DASH, INSURANCE COMPANY TOTALED THE VEHICLE AND THE VEHICLE MANUFACTURERS CUSTOMER SERVICE STATED IT DID NOT GET HIT HARD ENOUGH TO DEPLOY AIRBAGS. THERE HAS BEEN A COUPLE TIMES PREVIOUS TO THE ACCIDENT THAT I WOULD BE AT A RED LIGHT WITH MY BREAK PEDAL ALL THE WAY DOWN AND ALL THE SUDDEN I WOULD START TO SLOWLY ROLL, WITH THE BREAK PEDAL STILL ALL THE WAY DOWN.