GPS traffic safety

Moin Everything is built into the cars/sold for safety, it is a real advertisement among the providers, e.g. who has how much airbags or who does how well in accident tests, whose driving assistant is the best etc. What I am surprised about is the following: Almost every modern new car has a navigation device on board which can track the GPS satellites to determine speed and location. The device also knows how fast you can drive where and warns the driver. rer. Why is this information not coupled with the motor control? That is, where 100kmh is allowed to be regulated at 100kmh, at 50, at 30, at 70..usw… The map material of the Navis is regularly updated, would have to work, wouldn’t it? That would be a cheap safety gain, I guess 50cent/Fzg, and no one drives too fast anymore. The radar traps could at some point all pack up if all Fzge have such a device, still takes 20 years. The next step would be to connect all the GPS-Fzge with each other, who drives just where how fast, then you could also regulate the distances, nobody drives closer than allowed, would be great or? This of course restricts the freedom of the driver a little bit but when we had to buckle up also nobody asked for the “freedom”, the highly praised safety should be worth it. Gruss Willy