[a4000]

They are already doing this in the EU now (https://www.drive.com.au/news/new-cars-will-stop-drivers-fro...), albeit not with actual speed restriction as far as I know, but just bongs a warning instead.

It mainly relies on the OCR reading speed signs which most new cars have had for a while now, although as anyone who has it will know, it's not that always that great.

I have just this in my car and on one road where I live regularly that has a 60km/h limit my speed limit warning would always read 5km/h past a certain point and it took me a while to realise it was actually picking up a speed sign for 5km/h in a small car park off some way to the side.

It also has trouble with mixed speed limits that I have in my area where both speeds are on the same sign, for example some roads are 80km/h in normal conditions but 60km/h when wet or 70km/h for cars but 40km/h for trucks and buses, usually it defaults to the lower limit.

Luckily my car is a bit older so it just flashes red when you go over what it thinks is the speed limit, but more modern cars that will bong or even restrict speed would be infuriating.

[alistairSH]

It mainly relies on the OCR reading speed signs which most new cars have had for a while now

Have they? That must be an EU thing, or very recent, because it's mostly only luxury cars here in the US as best I can tell. Certainly wasn't even an option on our 2017 BMW or 2021 Honda.