AS I WAS DRIVING ON INTERSTATE 83 IN YORK PA., MY CRUISE CONTROL WOULD NOT DISENGAGE. IT ACCELERATED TO 80 MPH. WHEN I TRIED TO TURN IT OFF, I WAS UNABLE TO DO SO. WHEN I APPLIED MY BRAKES TO DISENGAGE, NOTHING HAPPENED. I THEN CANCELLED THE CRUISE AND TURNED IT OFF, IT STILL WOULD NOT STOP ACCELERATING. AT THIS POINT I WAS TRYING TO APPLY PRESSURE TO MY BRAKES BUT WAS STILL UNABLE TO STOP FROM ACCELERATING. I MANAGED TO GET OVER TO THE BREAK DOWN LANE AND SLOWLY PUT ON THE EMERGENCY BRAKE, WHICH TEMPORARILY SLOWED ME DOWN. I HAD THE EMERGENCY BRAKE ALL THE WAY IN, AND THE CAR STARTED TO GO FORWARD AGAIN. AT THAT POINT MY ONLY OTHER OPTION THAT I COULD THINK OF WAS TO TURN TOWARD THE GRASS EMBANKMENT AND GO ON THE INCLINE AND HIT A SIGN SO THAT IT WOULD STOP MY VAN. IT STILL DID NOT STOP COMPLETELY. IT BEGAN TO ACCELERATE AGAIN. AT THIS POINT I HURRIED AND PUT THE CAR IN PARK, AND TURNED OFF THE IGNITION. ONCE IT WAS STOPPED MY DAUGHTER AND I GOT OUT OF THE VAN. *AK