DRIVING NORTH BOUND ON I-90 IN LANE 2 FROM THE RIGHT SIDE, APPROACHING NEAR THE NORTH CUMBERLAND AVE OVER PASS AT APPROXIMATELY 50 MPH, WHEN IT APPEARED THE AUTO IN FRONT WAS SLOWING DOWN I APPLIED THE BRAKES AND THEY DID NOT ENGAGE OR SLOW THE VEHICLE DOWN. WITH VEHICLE 1 RAPIDLY GAINING ON THE AUTO IN FRONT OF IT, I SWITCHED OVER TO LANE 1 QUICKLY TO AVOID STRIKING THE VEHICLE FROM BEHIND, WHEN THE BRAKES DID NOT STOP THE VEHICLE, THE SPEED CONTINUED TO INCREASE, WHEN IT APPEARED I WAS GOING TO HIT THE WALL TO THE RIGHT OF THE SAFETY LANE, I CUT BACK INTO LANE 1 AND THE CAR, NOW GOING AT AN UNCONTROLLABLE HIGHER RATE OF SPEED, MADE ALMOST A COMPLETE LEFT ACROSS ALL 3 LANES STRIKING VEHICLE 2 IN THE 3RD LANE ON THE RIGHT REAR DOOR, WHEN SPINNING OFF OF VEHICLE 2 THE LEFT REAR OF VEHICLE 1 STRUCK THE WALL MAKING THE VEHICLE COME TO A COMPLETE STOP. *TR