WHILE DRIVING FORWARD IN TRAFFIC WHEN CAR CUT IN FRONT FROM THE NEXT LANE TO THE RIGHT. THIS REQUIRED EMERGENCY BRAKING, BUT MY SPEED WAS SLOW AND TRUCK SHOULD HAVE STOPPED WITHIN THE SPACE AVAILABLE AND THE TRUCK BRAKES SEEMED TO FEEL AS IF THEY RELEASED ON THEIR OWN. DAMAGE OCCURRED TO THE CAR I REAR ENDED AND THEY REAR-ENDED A CAR IN FRONT OF THEM. DAMAGE TO ALL 3 VEHICLES WAS LIGHT ENOUGH THAT ALL WERE DRIVEN AWAY AFTER CRASH. ON THE WAY HOME I NOTICED THE BRAKES WERE NOT WORKING PROPERLY AND LOST STOPPING POWER SHORTLY AFTER DEPRESSING THE BRAKE PEDAL EACH TIME. AFTER A 2 MILE TRIP HOME LIKE THIS I CHECK THE BRAKE FLUID AND FOUND IT LOW. THEN I SAW FLUID ON THE GROUND AND FOUND THE BRAKE LINE WAS DRIPPING BRAKE FLUID. IT APPEARS TO HAVE RUPTURED FROM THE PRESSURE OF THE FLUID INSIDE. THE LINES WERE ALSO SERIOUSLY CORRODED. THIS APPEARS TO BE A PROBLEM IN MATERIALS AND MY 1985 SUBURBAN SHOWS ALMOST NO SIGNS OF CORROSION ON THE BRAKE LINES AND IS 20 YEARS OLDER. I WAS TICKETED FOR RECKLESS DRIVING FOR NOT STOPPING BECAUSE THE CAR THAT CUT IN FRONT MADE IT ALL THE WAY TO THE CENTER OF THE LANE BEFORE I STRUCK IT. THAT CAR WAS BEHIND ME AND WENT AROUND ME AND CUT IN FRONT BECAUSE I WAS ?DRIVING TOO SLOW? ACCORDING TO HER. I HAD LEFT TWO TO THREE FULL CAR LENGTHS IN FRONT OF ME AND THIS BOTHERED HER. I HAD A GOOD AMOUNT OF DISTANCE TO STOP THE TRUCK EVEN AFTER SHE CUT IN FRONT, BUT THE TRUCK WAS UNABLE DUE TO THE LINE BREAKING WHEN I PUSHED THE PEDAL HARD. THE L