I WAS TRAVELING EAST ON US I90 IN CHARLTON MA IN HEAVY HOLIDAY TRAFFIC KEEPING A SAFE INTERVAL AS CARS KEPT BRAKING OFF AND ON AND SOMEONE A DOZEN CARS UP SLAMMED ON THIER BRAKES CAUSING A CHAIN REACTION. I HIT MY BRAKES HARD ALSO BUT DID NOT SLOW DOWN FAST AS IF I WAS STILL PRESSING ON GAS PEDAL I WAS SLOWING BUT NOT (RIGHT ?) OR FAST ENOUGH AS I WAS STANDING ON BRAKE BUT STILL KEEP MOVING FASTER AHEAD THEN SEEMED RIGHT? THIS HAD HAPPENED A MONTH OR SO BEFORE AND I THOUGHT MAYBE MY RUG HAD SLIPPED UNDER BRAKE PETAL AND OVER MY GAS PEDAL AS IT SEEMED THE HARDER I PRESSED ON BRAKE I STILL KEPT MOVING FORWARD AS IF BOTH WERE BEING PRESSED AT THE SAME TIME IT SEEMED VERY ODD OR ERIE AS I JUST KEPT MOVING FORWARD. I DID MANAGE TO STOP JUST IN TIME BEFORE I HIT HIS BUMPER. LIKE I SAID I THOUGHT AT THE TIME MAYBE THE RUG HAD SLIPPED OR SOMETHING BECAUSE IT HAD SLIPPED OFF THE HOOK ON THE FLOOR BUT IT HAD NOT REALY MOVED THAT MUCH AND I SECURED IT WITH HOOK ON FLOOR AND CHECKED TO MAKE SURE IT WAS STILL SECURE THE SECOND TIME IN JULY 3RD AND IT WAS . SINCE THEN I HAVE READ ABOUT 2014 SONATAS HAVING PROBLEMS WITH THIER BRAKES THAT FITS WHAT HAPPENED EXACTLY ON OVER 800,000