Interesting. I expect if I were moving a city I would first build a layer for transport and utilities, and then build the city on top of that. In the past we've built cites on the ground and then dug sewers and subways etc underneath. But if you built first a layer that was going to be the "underneath" of the city, and then built the city on top (including parks and lawns and what not, you could really do a good job of making sure the connections were solid.