https://www.titlemax.com/discovery-center/planes-trains-and-automobiles/u-s-cities-with-the-highest-and-lowest-vehicle-ownership/
https://www.titlemax.com/discovery-center/planes-trains-and-automobiles/u-s-cities-with-the-highest-and-lowest-vehicle-ownership/
This isn't surprising if you've ever been to these cities. It is almost impossible to exist without a car in the green areas, and it's almost impossible to exist with a car in the purple cities..
Many many more cities could be green, but aren't because people too poor to have a car live there. The green cities are not unique at all in there car needs only in their lack of poverty.