Amsterdam is easily my favorite city that I have been to. The streets there are for people, and cars are just one of many ways to get around, and not the best way so not many people use them. They are not allowed to take up half the space in the city. There is public and political support for all this.
I used to think Philadelphia could be like Amsterdam. Of course, physically, it could anytime. Our enemies are ignorance and cynicism though, and I am less optimistic lately that these enemies can ever be overcome. The occasional visit to Amsterdam might be the best I can hope for, as long as it stays dry enough to visit (and if anybody can keep it dry, the Dutch will do that as long as it is possible. The Dutch are a bit smug, of course, but you have a right to be when you are pretty much doing everything right.)