Manual driving will go away at some point. And fully autonomous vehicles would be electric, so no noise increase.

Once autonomous vehicles reach a critical mass, there won't be a real need to own one and auto insurance premiums will skyrocket since human drivers would be the highest risk.

The government probably won't need to intervene to kill human driving on public roads

Plus the number of vehicles in existence will dramatically decrease, thus lowering total pollution from manufacturing and maintenance.

The fact is that humans are awful at driving; it's one of the leading causes of death. A computer that doesn't get tired, intoxicated, or distracted with 360° sensors reporting a great many times per second will be significantly safer than a human.

We're not there yet, but companies like Waymo are making significant progress.