I WAS DRIVING AND MERGING FROM THE LOCAL LANES ON MARYLAND I-270 SB TO THE MAIN LANES. IN ORDER TO MOVE SLOWLY FROM ONE LANE TO ANOTHER, I APPLIED THE BRAKES TO SLOW DOWN AND MOVE TO THE LANE ON MY LEFT. WHEN I APPLIED THE BRAKE, I HEARD A STRANGE SOUND AND THE VEHICLE JERKED VIOLENTLY. THE VEHICLE FAILED TO DECELERATE, THEREFORE I ATTEMPTED TO RE-APPLY THE BRAKES ONCE MORE. AT THIS POINT, THE BRAKES DID NOT SEEM TO BE WORKING AND THE VEHICLE CONTINUED TO ACCELERATE BEYOND MY CONTROL. I WAS UNABLE TO CONTROL THE SPEED USING THE BRAKES AND THE VEHICLE HIT SEVERAL CARS TO MY LEFT AND RIGHT. AFTERWARDS, MY VEHICLE HIT A LARGE TRACTOR TRAILER AT WHICH POINT THE VEHICLE FINALLY CAME TO A STOP. THROUGHOUT ALL OF THIS, MY AIRBAGS DID NOT DEPLOY AT ALL. MY VEHICLE HAS BEEN DECLARED A TOTAL LOSS DUE TO THE DAMAGES BY MY INSURANCE, LIBERTY MUTUAL. *TR