> I'm not sure there's a major city in the U.S. that wasn't already a major city pre-car.
Los Angeles. Possibly more.
> And cities weren't redesigned post-car, that's why a lot of them have road problems.
Sure they were. Not from scratch, but incrementally. Its true that because it was incremental and not ground-up, and mostly affected new development and re-development, that cities that were major cities pre-car (like NYC) look very different than newer cities (Los Angeles).
> U.S. cities are spread out because of suburbanization.
"Suburbanization" is an effect, not a cause. Designing for cars is a (but not the only) cause.
Los Angeles. Possibly more.
> And cities weren't redesigned post-car, that's why a lot of them have road problems.
Sure they were. Not from scratch, but incrementally. Its true that because it was incremental and not ground-up, and mostly affected new development and re-development, that cities that were major cities pre-car (like NYC) look very different than newer cities (Los Angeles).
> U.S. cities are spread out because of suburbanization.
"Suburbanization" is an effect, not a cause. Designing for cars is a (but not the only) cause.