[avmich]

That's not what I was asking. The definition - at least my def - is different, your cases don't explain how to solve it - indeed, there is no known solution, and that's the point. You can't get around government, which can solve some problems.

[mothballed]

The only "known" solution is to privatize the commons. One way to do that in this example is to use a toll road.

It seems bizarre to damn some methods of private roads for not solving something you claim has no solution, then just glance over the ones that mitigate it.

You've shown no reason why you can't "get around government" but rather just dismiss the ways that just did.