I hear you Phil and agree the concept is laudable, but I have doubts on the outcomes, especially in the short term.
There have been incidents with automated systems in the avation sphere, where the high level of automation and complexity has lead to disastair or near disastair, Airbus spring to mind. These occured where there were not one but two individuals that had undergone rigorous training on these systems, yet still things went awry.
With vehicles everybody will be different, but automation that works sucessfully for well over 99% of the time will lull a large chunk of people into becoming too comfortable with the tech and rely on it. Texting, phoning, looking at the web on phones is already a considerable blight and I can't see it getting better if automation further reduces driver input. I stress it won't be everybody and it'll depend on the individual and the circumstances. I'm thinking about perhaps a lengthy commute home from the office (that you've done thousands of time before), you've had a long tiring day and perhaps the weather isn't the best. When the time comes to intervene the average driver will either be doing something else or be that shocked the tech has failed the accident will be a done deal.
Then again I'm a dinosaur, in aviation automation has certainly saved more lives than on the rare ocassion it has led to lives being lost. So in the long run automation will be a force for the better, but that doesn't stop concern about the downsides.
As for the ability to exceed the limit for short manoeuvers, I don't know but I'd be doubt it. Legislation is a large blunt stone axe and always results in unintended consequences. How it pans out we shall have to wait and see.
On noise, when (if?) the vast bulk of vehicles are electric, it will be interesting to review road accident stats, especially pedestrian injuries/fatalities. Back in the 50s and 60s Glasgow City Council (where I live) introduced Trolley Buses, electrically driven buses taking their power via overhead wires. I remember them and marvelled at the smoothness and lack of noise as a kid. No idea of the number of accidents they were responsible for but the locals very quickly named them "The whispering death"