I ATTEMPTED TO SLOW THE VEHICLE, PREPARING TO STOP. I WAS TRAVELING BETWEEN 65/70 MPH. WHEN PRESSING ON THE BREAKS THE VEHICLE DID NOT SLOW DOWN. I PUMPED THE BREAKS. THE CARS IN FRONT OF ME WHERE AT A STOP AND GETTING CLOSER VERY QUICKLY. I PUSHED AS HARD AS I COULD ON THE BREAK AND THEN TRIED TO PUSH ON THE EMERGENCY BREAK LOCATED ON THE FLOOR. IT ONLY KICKED BACK. SECONDS LATER I HAD A DIRECT IMPACT WITH THE VEHICLE IN FRONT OF ME. AIRBAG DEPLOYED! THERE ARE NO SKID MARKS ON THE ROAD! THE VEHICLE WOULD NOT STOP!!!