BRAKE FAILURE ! TRAVELIN APPROXIMATELY 55 MPH WITH CRUISE CONTROL. TAP BRAKE TO RELEASE CRUISE. BEGIN COASTING. APPROACHING 4 WAY RED FLASHER. BEGIN BRAKING. NOTICE NOT SLOWING DOWN AS USUAL. BEGIN BRAKING HARDER. REALIZE NOT SLOWING DOWN. ATTEMPT TO STEER THROUGH INTERSECTION, BUT HIT TRAILER OF CROSSING VEHICLE.*AK