I'm planning to try and build an offset hex grid city
Basically there's one hex pattern for car traffic, and an offset hex pattern that's for pedestrians and cyclists, and where there's any intersections between the two, the car traffic gets raised to give pedestrian traffic an underpass.
Also every car intersection is a roundabout, and I'm considering doing alternating one way lanes with every pair being bracketed by transit only lanes.
Way I see it the addresses would be kinda like how NYC is organized, one parallel has roads, one has lanes, one has boulevards, and then on the pedestrian side you have street, alley, and row.
Doesn't just save number space, it'll also give you an idea of the best way to get to that address since street/alley/and row addresses won't have curbside parking, because pedestrian route.