I had a new scenario for this earlier this morning. Driving at a set 60km/h (where that was also the posted speed limit, ie no roadworks signs or buses or anything to convince the car of a lower limit applying) up a road with little red poles - effectively witches hats, but the little straight red poles, showed in the visualisation as witches hats - marking the centre line of the road, centre line and left side of the road painted nicely, lane width at least as wide as normal. Anyway, with the posted speed and set speed showing in the car correctly as 60 it refused to drive on TACC any faster than 45 until there weren’t any witches hats there. No warning beeps or other indications why it wanted to be slower, it just didn’t want to go any faster than 45. Even when I prodded the throttle it would speed up in response (again no warning beeps) but then slow back down to 45.
Hasn’t done that before (ie seems new with firmware 2023.44.1) and i drive up/down that road - Mona Vale Rd (Sydney Northern Beaches) up the hill from Mona Vale towards Baha’i Temple - almost daily and roadworks there have been ongoing for a couple of years.