The neighborhood developer paid for that. The roads connecting, donated many many years ago by the landowners at that time
- Private developer builds a sprawling subdivision with plenty of nice wide roads and lots. (So a very large area of pavement per tax-paying property.) And turns the whole thing over to the city/village/township, to be their public road budget black hole forever more.
- Private developer builds a very compact little development, with houses (or condo's) packed in like sardines along a rather narrow and minimalist Private Road.