WAS GOING TO CHURCH THURS EVENING AND FAST DRIVER AHEAD OF ME IN BUSY INTERSECTION. STAYED FAR AWAY FROM HER BUT WHEN SHE SLAMMED ON HER BRAKES, I HIT MINE AS WELL KNOWING I HAD PLENTY OF TIME TO STOP BUT THE BRAKES DID NOT WORK, EVEN THOUGH I PUMPED THEM AND THEN SLAMMED THEM ON AGAIN. (I HAVE HAD OTHER PEOPLE TELL ME THEY HAVE HAD THE SAME PROBLEM WITH THEIR O6 PRIUS'. I ENDED UP HITTING HER CAR AND MY CAR WAS TOTALED EVEN THOUGH WE WERE NOT GOING FAST (RED LIGHT UP AHEAD). I AM GOING TO SEE IF MY ACCELERATION WAS FIXED BECAUSE TRULY I COULD NOT STOP THE CAR. IN FACT A MAN WHO HELPED AT THE SCENE TOLD ME TO 'TAKE FOOT OFF THE BRAKE, THE CAR WILL NOT GO ANYWHERE' BUT I WAS SO SCARED THAT IF I DID THE CAR WOULD MOVE AGAIN.