When I was a boy, suburban streets were state-of-the-art: no sidewalks accompanied by slower than the normal traffic speeds. Often the streets were curved to encourage drivers to slow down. If necessary lower than usual speed limits signs were posted.
Today, sidewalks are back in style. Folks living on the older, sidewalkless streets are finding that when their street is repaved sidewalks are installed. This is done whether the residents want the sidewalks or not. Often the resident do not.