Paris' business district, "La Défense", is an excellent exemple of just that :) It's one giant "slate" constructed above the roads, between the skyscrappers. Yo

Paris' business district, "La Défense", is an excellent exemple of just that :) It's one giant "slate" constructed above the roads, between the skyscrappers. You don't see the cars and it's a nice place, really feels like how the future ought to be.