JUST MADE A LEFT HAND TURN FROM A TRAFFIC LIGHT . A CAR APPROXIMATELY 100FT. DOWN THE ROAD WAS WAITING TO MAKE A LEFT HAND TURN INTO A DRIVEWAY. WHEN I PUT MY FOOT ONTO THE BRAKE PEDAL IT WENT ALL THE WAY DOWN TO THE FLOOR. MY VEHICLE COULD NOT STOP AND I ENDED UP RUNNING RIGHT INTO THE OTHER VEHICLE. I DID NOT KNOW WHAT HAPPENED. THE VEHICLE WAS TAKEN IN FOR AN INSPECTION AND NOTHING COULD BE FOUND WRONG WITH THE BRAKING SYSTEM.