ON 3 OCCASIONS, VEHICLE MADE SUDDEN, SPONTANEOUS ATTEMPTS TO MAKE A LEFT LANE CHANGE. ON TWO OCCASIONS THE VEHICLE WAS IN SELF DRIVE MODE ON A FREEWAY; ON THE 1ST OCCASION, THE VEHICLE WAS IN THE LEFT LANE AND HIT A GUARD RAIL; ON THE 3RD OCCASION THE VEHICLE WAS STOPPED AT A RED LIGHT WHEN IT SUDDENLY ACCELERATED, TURNED SHARPLY LEFT AND RAN UP AN EMBANKMENT INTO TREES AND BUSHES, SUSTAINING SUBSTANTIAL DAMAGE.