DRIVING 58MPH W/TRAFFIC SPEED, W/CRUISE CONTROL ON; VEHICLE IN FRONT SLOWING DOWN; TAPPED BRAKES, BUT CRUISE CONTROL FAILED TO DISENGAGE; SHIFTED LEVER FAIL TO DISENGAGE CRUISE CONTROL. WAS NOT ABLE TO STOP UNTIL SWERVED TO MISS ANOTHER VEHICLE, AND HIT SIDE OF MOUNTAIN; AIR BAGS DEPLOYED. OCCUPANTS NOT SERIOUSLY INJURED. TREATMENT AT EMERGENCY ROOM. VEHICLE TOTALED. *AK