City children four times more lonely than those in countryside
telegraph.co.uk
telegraph.co.uk
But anecdotally, I know of families who live on a street where cars routinely go 45mph to get to the neighborhood inside a neighborhood, so can't play in the street in the suburbs.
I remember when Americans drove like that, before we rescinded the national 55mph cap. Over the past few decades things have gotten so bad here. Urban, suburban, and rural areas. Small neighborhoods and highways. Both coasts and everywhere in between. We just drive ridiculously fast.
I think of all the roads I walked (to meet friends, to get to school, to play catch) in Illinois, Florida, Alabama, D.C., and Virginia.... I've been back to all those places and they're way more dangerous.
There is also other factors like increased pollution, including noise and light pollution which may also have an impact on people's mental state over time.
More suburban and rural parenting tends toward unstructured time, in my observation. This likely does have a lot to do with the home setup being more conducive to spontaneity.