I WAS DRIVING ON THE INTERSTATE AT AROUND 65 MPH. THEY WERE CLOSING THE RIGHT LANE FOR ROAD WORK, LEADING EVERYONE TO MERGE INTO ONE LANE. I APPLIED MY BRAKES AND THEY LOCKED UP. AS I WAS MOVING FORWARD AND SLOWING DOWN AS EVERYONE WAS SLOWING BECAUSE OF THE MERGING (HOWEVER, THIS WASN'T HAPPENING SMOOTHLY, AS I WAS SKIDDING INSTEAD OF SIMPLY DECELERATING), I WAS REAR ENDED BY A CAR TRAVELING AT FULL SPEED (APPROX 65 MPH). THE FORCE OF THE IMPACT HIT ME INTO GRASS MEDIAN ON THE LEFT SIDE OF THE HIGHWAY. WHILE STOPPED FOR MERE SECONDS, I HAD NOT EVEN PUT THE CAR INTO PARK YET, MY CAR STARTED ROLLING DOWN THE MEDIAN'S EMBANKMENT, THROUGH THE WOODS WHILE MY FOOT WAS STILL ON THE BRAKE. I KEPT PRESSING THE BRAKE AND IT WAS NOT RESPONDING. I HIT A TREE AFTER ROLLING APPROX 100 FEET INTO THE WOODS. A TOYOTA DEALER IS CURRENTLY DOING THE REPAIRS, AND TOLD ME THAT THE BRAKES WERE IN FACT WORKING WHEN DRIVING IT AROUND THE SHOP AT SLOW SPEEDS. I FEEL LIKE NO ONE BELIEVES ME, NOR IS EVEN OFFERING AN EXPLANATION ON HOW THIS COULD EVEN HAPPEN. *TR