There's an interesting interview with a designer of SimCity, where he discusses parking: Geoff Manaugh: While you were making those measurements of different real-world cities, did you discover any surprising patterns or spatial relationships Librande: Yes, definitely. I think the biggest one was the parking lots. When I started measuring out our local grocery store, which I don’t think of as being that big, I was bl…
The REAL solution is going to look way more like Azimov's Caves of Steel style city.
* High speed people mover beltway / sidewalks
* No cost access to this transit
* A Theme Park like utility corridor system
Plus high speed (freeway like) bypass routes around / through the city which can exit into mega parking structures (much cheaper at large scale than wastefully cramming into a normal building's footprint) as external interface buffers between 'car land' / intercity transit, and 'pedestrian land' / intracity movement.