Comment by keyboard_slap

On this small scale, rebuilding would likely be more expensive than this tunnel. But extending this network to every home would be (IMO) on the same order of magnitude as redevelopment in cost, complexity, and time. Redevelopment is complicated during construction but this system is also complicated forever. Our cities are already being rebuilt piece-by-piece every day; I'd just like zoning laws to permit rebuilding with mixed use and higher density development