AT LOW SPEED (UNDER 5 MPH) I STEPPED ON THE BRAKE PEDAL AND HAD NO RESPONSE. I STOMPED DOWN WITH ALL MY MIGHT AND STILL HAD ABSOLUTELY NO RESPONSE FROM EITHER THE POWER ANTILOCK NOR THE MANUAL BRAKE. THE CAR CONTINUED FORWARD WITH NO SLOWING UNTIL IT HIT THE CAR AHEAD OF ME, TRAVELING SEVERAL FEET BEFORE DOING SO. I NEVER FELT ANY BRAKE ENGAGEMENT INCLUDING 'PUMPING' OF THE ANTILOCK OR ANY SLOWING. I WAS ON A CITY STREET AND HAD BEEN AT A FULL OR NEAR FULL STOP BEFORE LETTING OFF THE BRAKE TO ROLL FORWARD. I WAS GOING STRAIGHT AHEAD. BRAKES HAVE BEEN REGULARLY SERVICED.