I WOULD LIKE TO REPORT AN ISSUE WITH WHAT I BELIEVE TO BE THE BRAKING SYSTEM IN THE 2019 SUBARU OUTBACK. WHILE DRIVING NORTHBOUND ON THE DALLAS NORTH TOLL WAY, AT A SPEED OF APPROXIMATELY 65 TO 70 MPH, I TAPPED ON THE BRAKES TO SLOW DOWN FOR THE UPCOMING DECLINE. WHEN I ATTEMPTED TO PUT MY FOOT ON THE ACCELERATOR, THE CAR SUDDENLY AND ABRUPTLY STOPPED. IT WAS AS IF THE BRAKES "LOCKED", I WAS UNABLE TO ACCELERATE. WE CAME TO A COMPLETE STOP ON THE TOLLWAY AND WERE UNABLE TO ACCELERATE THE CAR. WE WERE HIT FROM BEHIND. THE STOPPAGE WAS SO SUDDEN THAT IT RESULTED IN A THREE-CAR COLLISION. THE ENGINE WAS STILL RUNNING AFTER THE COLLISION. THE POLICE OFFICER INSTRUCTED ME TO TRY TO DRIVE THE VEHICLE OFF OF THE ROAD, BUT DESPITE MY PRESSING THE ACCELERATOR, THE CAR WAS STILL UNABLE TO MOVE EVEN A SMALL DISTANCE. *DT *AS