WHEN I SPEEDED UP AND PRESSED GAS FROM 30 TO 55 MILE PER HOUR AT THE FREEWAY, I FOUND THE CAR IN FRONT OF ME SUDDENLY SLOWED DOWN. I WAS AT 55 MILE PER HOUR WHEN I FOUND IT AND TRIED TO PRESS THE BRAKE HARDLY. HOWEVER, THE BRAKE COULDN'T BE PRESSED HARDLY AND THE CAR COULD NOT BE STOPPED AS SOON AS POSSIBLE. THE CAR SLOWED DOWN SLOWLY AND HIT THE CAR IN FRONT OF ME, EVEN THOUGH I TRIED TO PRESS THE BRAKE HARDLY. THE BRAKE DIDN'T WORK WELL WHEN THE CAR IS IN THE PROCESS OF SPEEDING UP FROM LOW SPEED TO HIGH SPEED AT THE FREEWAY. *TR