[omgwtfbyobbq]

The idea of a free market is a bit of a fantasy, but the market does influence policy significantly, which is why there's a lot of car-centric planning around. There are also car-unfriendly places are the world that also have extremely high property values, so it's not due to policy alone.

[bobthepanda]

The car-centric planning came first, though; widespread development of suburbs would not have been possible without major highways being developed, for they would've choked on their own traffic pretty quickly.

[omgwtfbyobbq]

The development of some suburbs was enabled by mass transit prior to widespread adoption of cars.

https://en.wikipedia.org/wiki/Streetcar_suburb

Cars enable more suburban development, but their throughput on highways sucks compared to mass transit, which also minimizes their spread in some cases.

[zip1234]

There definitely are, but all of the ones I can think of off the top of my head were created before cars and zoning came about.