Well, if we're going pie-in-the-sky, my perfect city: 1. Scales traffic by distance from downtown, IE: a. Autobahn type speeds outside of city limits (90+mph)

Well, if we're going pie-in-the-sky, my perfect city: 1. Scales traffic by distance from downtown, IE: a. Autobahn type speeds outside of city limits (90+mph) b. Expressway speeds connecting major sections of the city with dedicated public transport (45-80mph) c. Bicycle/small car speeds connecting (15-30mph) local districts d. Walking to specific destinations within an area 2. Automated solutions for each speed (examples) a. Dedicated city to city rail. Hyperloop. b. Express vehicles stopping at major sections running on a loop. Subway, Monorail, Taxi Service. c. Small, single-person vehicles. d. Walking or people-mover type vehicles All moving of people/products would be a matter of scaling up and down within your range. Each range would only allow that class of transport (so, no cars/taxis in a walking area, no walking in an expressway area) I could probably spend days listing the problems this would solve, but some examples: 1. Practically eliminate pedestrain->traffic interactions that lead to accidents and annoyances 2. Eliminate parking problems 3. Improve general health (walking in local areas) and much less (if any) road-rage type issues 4. Improve product delivery times (assuming we could get distribution networks to work together) 5. Improve the appearance of the city (no roads in/by your parks) 6. Improve the appearance of homes (only sidewalks go to homes!) 7. Improve the mobility/freedom of individuals (no need to buy a car/get a license, simply find the right public transport) 8. Instant tourist attraction as everyone will want to come see/experience this new type of living Again, I could go on. It seems to me that designing transportation is the primary issue, branching out into all others.