I JUST MERGED ON THE HIGHWAY GETTING OFF THE ON-RAMP. I SAW AHEAD OF ME THAT THE CARS WERE SLOWING DOWN. I STEPPED ON THE BRAKE AND THE CAR WASN'T SLOWING DOWN I FELT SOME KIND OF VIBRATION IN THE BRAKE. I JUST KEPT MY FOOT ON THE BRAKE AND I SAW THAT THE CAR IS NOT SLOWING DOWN AND JUST KEPT GOING. I KEPT TELLING THE CAR TO STOP, STOP, STOP... AND IT DIDN'T STOP AND I KNEW IT I WILL HIT THE CAR IN FRONT OF ME... AND IT DID.