I took a crack at this today. Added linear footways throughout, tagged as asphalt with a width of 3m, and added more points on the curves to make them look smoother. I think it'll look nicer when rendered, but I don't think we're entirely out of the woods. At the junction where this note is placed, for example, I think it could be called a pedestrian area. Bikes and skateboards are also common through here, which we should make clear with tags.