just returned from a road trip to Victoria. Autopilot worked well most of the time. However and this happened more than once and on various expressways, the correct speed limit of 110 was displayed, AP cruising at that speed, when for no discernible reason message flashes up AP RESTRICTED TO 80km/hr. And car starts slowing. I over rode that with accelerator for maybe 300 m and all settled down to normal again. Anyone else? Explanations anyone?