1. Please don't delete and redraw to pencil-tip shape intersections. This unneccessarily distorts the left turns, and will confuse routers and applications. At least you don't need to modify the ground-level southbound. https://labs.mapbox.com/mapping/mapping-for-navigation/modeling-intersections-for-map-navigation/ You can use https://wiki.openstreetmap.org/wiki/Relation:connectivity#Examples if needed. 