I have a 2002 Japanese imported vehicle (Nissan Elgrand) and it has all sorts of alarms buried in it's (Japanese) menu system and I think such alarms are optional (if only I could read the menu!) and can be set to differing levels.New vehicles in Japan, and hence used ones in large parts of Asia-Pacific, have an alarm which pings continuously when you exceed the 100km/h Japanese national speed limit. Or at least they did in the 90s, AFAIK it hasn't been removed.
I have an app on my smartphone to display current vehicle speed (phone on a dash mag mount) and I can set different alarms for different speeds and I do use that facility all of the time as it is all too easy in a comfortable, quiet car to go too fast.
Anyway, I like the idea of the sort of tech that is being proposed - what about each driver has to put in their bank details before driving and then if they choose to go over the speed limit then the 'fine' is deducted straight away!