BRAKES FAILED. COMING TO A STOP SIGN ON CR 13, BRAKE PEDAL WENT TO THE FLOOR. BRAKES DID NOT SLOW OR STOP THE CAR AT ALL. PUMPED THE BRAKES 3 OR 4 TIMES, NO BRAKING. WENT THRU STOP SIGN HITTING ANOTHER VEHICLE. AIR BAGS DID NOT DEPLOY. AUTOMATIC BRAKING SYSTEM DID NOT ACTIVATE. ESTIMATES I WAS 50 YARDS FROM THE STOP SIGN WHEN I FIRST APPLIED THE BRAKES, SPEED BETWEEN 20-30 MPH.