Because of population growth, space for living will become a problem in the future. Either we could build lots of skyscrapers or we could build underground cities. And I think underground cities would help the world much more than skyscrapers.
While there may be many better designs than what I have in mind, I think the current cities are inadequately designed. There are many problems that the current cities are unable to face.
So I would like to hear your designs of ideal cities with current technology. Another question is while the current governments can't redesign cities on a whim, do they take action to build futuristic green cities?
Edited: It's true that many cities are not designed by architects and they do suffer from it. These cities are not green ( environmental friendly) cities. These cities have slums. And governments usually destroy and rebuild some parts of these cities due to lack of planning. Most of the problems could be avoided by planing them ahead.
Maybe free citizen's would not like living in 'ideal' cities. But we only have to use restrictions on buildings to create them. So I don't think people would be averse to the idea.
What is an ideal city? Ideal city has to be environmental friendly. Ideal city should not suffer from over population. Ideal city should be able to withstand natural hazards. Ideal city while not completely self sufficient would be able to function clearly in a disaster without aids.