>>16708599
>maximize quality
Quality of what? Walkability? Quality of Life? Safety? Economic potential? I don't know what you mean

The biggest problem I see with modern cities is transit.
It's difficult to walk in cities, but it's also difficult to drive in cities. Simply getting around cities is challenging.

To get the obvious out of the way, there's no such thing as a no-cars city when speaking of walkability. You don't create a walkable city by simply banning cars, all that will do is render your city inaccessible to infrastructure. Shops need large vehicles to deliver their goods and these must come right up to the building. Also people don't always want to live in the city and will need to travel to the city. And finally, cities are big, people can't be expected to walk from one end to the other.

I think underground transport infrastructure is the solution to this.
All the trains and cars go underneath in a vehicles-only environment, with an abundance of entry and exit points allowing them to interact with the surface. And all the people can freely walk atop the ground.
It's like how in buildings, we hide all the cables and pipes behind the walls. They're still there and doing their job, they're just not in the way.

As it currently is, we need cars just as much as we need pipes... they're just in the way.