[barbazoo]

Do those "neighborhoods" even have sidewalks then?

[wing-_-nuts]

Not usually, or if they do, they're merely 'decorative' in that they're not a viable option for pedestrians to get from A to B. They just end without signals or crosswalks. Someone in a wheelchair would literally have to drive in the street in many areas of the south.

[datavirtue]

they end the sidewalk a good poke from the brown neighborhoods

[ttymck]

Not always, and, in my experience, the answer is increasingly "no".

[lotsofpulp]

I have not seen of a single new development in the US without sidewalks in the last 20 years+. It must be the law in 99% of cities to build a sidewalk anytime a property is developed.