Earlier quoted context omitted.
I predict that the politicians will, after much grumbling by the public, have the speed limits raised to reflect the speeds people actually want to drive. And then we'll have to endure a bunch of breathless hand wringing and concern feigning about how "it will be a bloodbath" from the usual suspects.
You have too much faith. My predicted path is they can get the cars to report on themselves or each other and automate the fines.
Do the politicians really want to fight that fight for a few bucks when they can just tax us?