DRIVER PROCEEDED TO STOP THE VEHICLE IN TRAFFIC AND THE BRAKES FAILED AND DID NOT ENGAGE. THE VEHICLE DID NOT COME TO A STOP AND HIT THE CAR IN FRONT OF IT. ACCORDING TO AN OF-DUTY POLICE OFFICER DIRECTLY BEHIND MY VEHICLE, THE BRAKE LIGHTS WERE LIT UP AS IF THE BRAKES WERE FUNCTIONING BUT NO SLOWING OF THE VEHICLE OCCURRED. *TR