I did a similar calculation for the maximum population of a city where everything is reachable within 20 mins of train & walking. The result was ~500,000 peopl

I did a similar calculation for the maximum population of a city where everything is reachable within 20 mins of train & walking. The result was ~500,000 people. I would like to make a more detailed design and simulate it. The simulation could even include things like sunlight entering living spaces and workspaces and sunlight on walking paths during commutes, over the year. A new city could maintain such simulations as it builds and develops, and end up with much higher quality of life for all residents.