You can just look at neighboring Mexico with 1/6th the per capita income and correspondingly lower public budgets where transportation, urban maintenance, and quality of city life are routinely better. And not just relatively better: Mexican cities (outside the shady border region) are nicer than American cities to live in. If you could put a typical neighborhood from Puebla or Guadalajara or León or Mexico City into Dallas or Los Angeles or San Jose or Atlanta, it would be the best, nicest neighborhood in the city.
And that's not even bringing up the great cities of Europe at all. Because that would be completely unfair.
It's like the health care system: Even a great country does some things horribly wrong and suffers for it.