This sounds like the ideal world. I could see some speculative fiction examining a society that works like this, where communities themselves are completely walkable, and only use cars to travel between them.

One of my main reasons for reading alt-right forums, other than keeping my finger on the political pulse of the West, is because I like seeing discussion about building a better society. Many ex-socialists claim that innate human selfishness was their motivation for losing confidence in that ideology. So what would society look like if people were grouped with others that they fundamentally trust and empathize with more? Sometimes I think the existence of different cultures/races is necessary to function as an Other, which strengthens the cooperation of the in-group.

Anyway, regarding urban planning. Maybe some sort of matrix can be created to determine approximate land size/composition for certain community specifications. You could plug in metrics like population size, desired industry composition, climate, etc. I've been thinking about natural patterns of settlement growth, and whether there are any universals for industrial development. Like most communities would be primarily agricultural up to a certain point, and after a certain population size it is almost inevitable that they would have at least one local IT company or food manufacturing plant to serve the community's needs, or something like that.

There are probably also optimal ratios of different industries to each other, e.g. maybe the medical sector in one settlement is too large compared to its agricultural sector. And skewed ratios between specific occupations in themselves definitely exist, e.g. too many nurses compared to doctors in a hospital or too many bakers compared to butchers in one town.

(By the way it appears I've neglected to focus more on the class aspect of cars but it was pretty obvious anyway. Poor people are very disadvantaged in the USA because of the urban structure, emphasis on cars, and generally abysmal public transport in many cities. And there's obviously people flexing on others and the possibility that people can get discriminated against based on the vehicles that they drive. It's still a cool technology though. I think there needs to be greater activism for the right to repair and people need to be more wary of excessively complicated newer models that are much more difficult to repair while not being significantly more useful.)

Edit: Typo.