[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.