Here's some utopian city planning/worldbuilding worthy of a science fiction novel. This proposed city is built on rotating concentric rings. Need to go to work? Just wait a few minutes and it rotates closer to you.
Anyone who has lived in a city with a complex web of public transit immediately recognizes the level of geekery that can be applied to travel plans and routes between multiple rings. The fastest route to a location three rings away might include momentary backtracking into previous rings, in finely-timed forward and backward maneuvers. Of these minutia are entire plots assembled.