Public transportation in America might as well be non-existent, and American suburbs which is where the largest portion of the country lives in, are un-walkable. You can't do anything if you don't have a car. I think this isn't clear to people who live in the few very large cities in the US, or live elsewhere in the word where public transportation does a good job of getting you around in a timely manner.

To give you an example, I live in San Jose area. To get to downtown san jose, it'll take me less than 10 minutes in a car on the high way, 45 minutes on the bike through the streets, or 1.5 hours on the bus.