WHILE GAINING ACCELERATION ONTO THE FREEWAY, I WAS FORCED TO MAKE A SUDDEN STOP. I HAD PLENTY OF ROOM TO STOP SAFELY AND WAS NOT TRAVELING AT A HIGH RATE OF SPEED. I DEPRESSED THE BRAKE PEDAL AND THE CAR DID NOT STOP IN TIME TO AVOID A COLLISION WITH THE VEHICLE IN FRONT OF ME. THERE WERE NOT BRAKE MARKS ON THE ROAD AND IT FELT AS IF MY VEHICLE HIT THE ONE IN FRONT OF ME AT FULL SPEED. I BELIEVE THE BRAKES COMPLETELY FAILED ME AND THE ACCIDENT WOULD HAVE BEEN AVOIDED IF THE BRAKES HAD DONE WHAT THEY WERE SUPPOSED TO. OKLAHOMA CITY, OK INTERSTATE 40 AND MCARTHUR.