I WAS DRIVING 45 ON A 4 LANE HIGHWAY THE CAR IN FRONT OF ME HAD STOPPED DEAD IN MY LANE I HAD PLENTY OF DISTANCE TO STOP BUT WHEN I APPLIED THE BRAKES I FELT THE ANTILOCK BRAES VIBRATE TWICE AND THEN IT FELT LIKE I WAS STILL GOING THE SAME SPEED NOT SLOWING ME DOWN (I HAD BOTH FEET ON BRAKE PEDAL WHEN I FINALLY STOPPED).RESULTING IN ME STRIKING THE CAR AND TOTALING MINE AND HIS. WITNESSES SAID IT LOOKED LIKE I HAD APPLIED THE BRAKES IN PLENTY OF TIME BUT DIDN'T STOP. I DID NOT KNOW HE HAD STOPPED BECAUSE HE HAD HIT THE CAR IN FRONT OF HIM WHICH HAD PULLED TO SIDE OF ROAD . THIS WAS A 4 CAR ACCIDENT CAR 2 HIT CAR 1 AND THEN CAR 3 HIT CAR 2 LEAVING CAR 3 SITTING IN ROAD WHICH I HIT CAR 3. ALL BECAUSE CAR 2 WAS LOOKING AT A ACCIDENT IN MEDIAN. I ASKED TO HAVE CAR BRAKES CHECKED AND THEY SAID IT WOULD COST TO MUCH TO HIRE ENGINEERS TO CHECK OVER.