Idk. Technological enforcement seems like it really should be the last resort here. Why should we not focus on stopping the construction of stroads and building safer streets and roads first and foremost before we reach for a tech solution that will undoubtedly come with privacy and abuse related tradeoffs while also likely being less effective.
Think probabilities here. Given human nature, what are the most probable solutions?
I’ve seen a number of cities find the authority or political will to increase the number of automated speed cameras. This suggests (while not a complete complete solution) a real step in the right direction
Given the entire urban planning political environment has shifted towards gradual but substantial infrastructure changes, at this point the main barrier to change is just making it happen. And to achieve that all you need to do is push for new road standards and guidance at a city, county, or state level.
Once that's done the changes can roll out whenever there's maintenance or road widening going on. This is for example what Florida is doing to push for a comprehensive passenger rail system and it's what other countries have done to make their roads and streets safer and more efficient as well. So it'd stand to reason the same principle would work at state and local levels in the US for this as well.
The only real argument against it I could see is that it'll take too long but 30-50 years really is nothing for widespread infrastructure improvements.