Would be good to get stats on this. Does most of the US (by population, not by area) really not manage the roads (potholes, etc)? And not trash? I've yet to live in a place that didn't have either (across multiple states), but I also don't live in rural areas.
Neighborhood streets - it's mixed, largely on age of development. Pre-1980 (very roughly) that state/county likely own and maintain the roads. Post-1980 (roughly) it's an HOA or condo or similar.
