Visual traffic-sign recognition (TSR) have been in cars since 2008 and mandatory since 2022.
I’ve lost track the number of times I’ve exited a construction and not known what the hell the speed limit is because previously it changed somewhere within the zone before the construction started.
Or worse, a total lack of signs on rural roads.
Just had a case today in WI where I left one road at 55 MPH onto a county road, and had no idea that the new limit was 45 until we checked Google Maps.