Sim City's sort of on the correct solution track here.
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.
The REAL solution is going to look way more like Azimov's Caves of Steel style city.
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.