[CamperBob2]

America is simply too big for public transit to replace cars to any great extent.

There's an old cliche that goes something like, "In America, people think 100 years is a long time. In Europe, people think 100 kilometers is a long distance." It's pretty much spot on.

[hnlmorg]

Even assuming this is fair (which I don't believe it is) that doesn't explain the localized problems per city that we're discussing.

[exfascist]

I'm not convinced the physical size is the problem.