If ice conditions are detected by outside temps, traction control slippage detection, and perhaps weather reports, reduce the Autopilot speed below the speed limit.
Winter is coming. Often ice at intersections gets polished by people spinning their tires. Also multi-car pile-ups on highways. It would be nice for TACC/AP to drive more slowly based on road conditions, traffic reports, etc.
I don’t know how they do it, but use info like this maybe: https://roadreports.ama.ab.ca/
This is really complicated, but worth a lot too. On an icy winter day, we can have 100+ car accidents in my city alone.