You go into a car park with a limit of 5, when you leave the idiot system will expect you to do 5 on the main road until it sees another sign.
I have all speed limit alerts turned off because a system that just remembers the last sign it saw but can't logically associate signs with roads or remember them is wrong about 50% of the time.
A GPS based system probably doesn't pick up signs from parking lots you drive past and similar nonsense, though.
Camera based systems issue a lot of false alarms, because drivers are just supposed to know that they've left a lower speed area and are back on a main road now. You don't have speed limit signs on every intersection.
Mandatory speed limiters come into force in the EU and Northern Ireland ( eandt.theiet.org ) Englisch
Chad VLC ( lemm.ee )
I'm about to cast some gnarly shit. ( lemmy.world ) Englisch