WHILE DRIVING APPROXIMATELY 35 MPH, I TOOK MY FOOT OFF THE ACCELERATOR AND THE VEHICLE ACCELERATED UNTIL IT WAS THEN GOING APPROXIMATELY 50 MPH. I PUSHED DOWN ON THE BRAKE PEDAL TO SLOW DOWN SEVERAL TIMES, BUT THE CAR DID NOT SLOW DOWN IT CONTINUED TO DRIVE AT THAT SAME SPEED. THE VEHICLE THEN STRUCK A STOP SIGN AND CAME TO A STOP. *TR