> I guess my basic question is, are the poorest people still living in city centers? I suppose that there likely are small numbers of people living far outside

> I guess my basic question is, are the poorest people still living in city centers? I suppose that there likely are small numbers of people living far outside of cities and away from traffic, like up in the mountains of Appalachia or living off the grid in tents or in communes deep in forests, who are poorer than people you'd typically find in urban areas, but it's still the poor in the US who are dealing with the worst of the harms traffic causes compared to the better off/wealthy. They're also the least able to mitigate those harms or deal with the fallout caused by them.