It takes two seconds to turn off in my car (though by law it has to reset on every drive), but I never bother. In situations where it's "ok" to drive a little over the limit, it's a small price to pay and a gentle reminder.
Dataset is readily available for most places. Pull local on entry to jurisdiction on every drive…
Internet connected options here in Australia generally have good speed limit data but there are generally very few variable speed limits that allow you to travel faster than usual.
Transition is never perfect but surely regulation would account for that?
I genuinely don’t know but to me it’s an interesting problem.
The speed limit display is great for simple highways and I appreciate the warning when I reach a speed zone, but not ready for anywhere complicated.
No. They beep when they think I go above the speed limit.
Technically it is wrong 100% of time because the car underreports the speed. But even if we agree to ignore that fact, it is still wrong constantly because the car doesn't have nearly enough sensors and compute power to actually figure out what's the limit at the moment.
Thus this feature is as useful as cookie banners.
If you can't drive into a tree at 200mph and kill yourself in a car, then I do not what it.