WAS TRAVELING ON THE RAMP TO ROUTE 28 AND APPLIED BRAKES - TWO CARS WERE AWAITING ENTRANCE TO HIGHWAY AND THEY STOPPED AT THE END OF THE RAMP. I APPLIED BRAKES WITH A GOOD 20-25 FT DISTANCE BETWEEN MY VEHICLE AND THE CAR IN FRONT OF ME (AT SPEED OF APPROX. 15 MPH) AND VEHICLE BRAKES MADE RUMBLING SOUND, VEHICLE SLIDE ON ROAD SURFACE AND FAILED TO STOP CAUSING REAR END COLLISION TO 2 CARS IN FRONT OF MINE. WHEN APPLYING THE BRAKES - FULLY DEPRESSED TO THE FLOOR - BRAKES RUMBLED, SEEMED TO LOCK AND CAR SEEMED TO SLIDE, AND VEER TO THE RIGHT BUT DID NOT STOP. I MENTIONED TO OFFICER M. BOWSER, STATE POLICE, THAT THERE WAS A PROBLEM WITH THE BRAKES. I RECEIVED A CITATION FOR CARELESS DRIVING ALTHOUGH I TRIED TO STOP THE VEHICLE) - WAS ADVISED ONE SHOULD HAVE CONTROL OF VEHICLE AT ALL TIMES REGARDLESS OF SITUATION. ALSO RECEIVED 3 POINTS.