The Brits can't drive into downtown London anymore. Rome- ditto. In Copenhagen & Amsterdam they learned this years ago. It's coming to the US, too.
Semi-Facetious solution- Send the Chinese all of our used cars, and they can ship us all of their 200,000,000 used $%^&**&%$# ugly, city bicycles and we get a few of our Trillion $ back. And Chinese gas is STILL too cheap.

Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison