[tenacious_tuna]

Trails will help highway traffic between major cities, but it doesn't address how spread out suburbs are from people's jobs and support infra (grocery stores, doctors, restaurants, etc). It's a chicken-and-egg problem, now:

- people are spread out because they've owned cars, so the distance doesn't bother them

- If you take their cars away, they're too spread out to support themselves, because of how the towns were built.

[PopeRigby]

Totally. American cities we're built with cars in mind, and it's really crippled their potential. Densely packed cities with subways and a lot of vertical freedom are the best way to build. They prevent deforestation because you don't need to expand outward, and they help with pollution because you can have maybe a couple hundred metro cars instead of millions of individual cars. I'm not sure how this would be implemented now though, because like I said, American cities have been crippled by their car infrastructure.