San Francisco
A detail of the West shows the relative lack of roads in mountainous areas, punctuated by the densely populated Bay Area.
United States
Original image of the lower 48 states.
The Great Lakes
Chicago and the shore on the left, Detroit to the right: a wonderful range of sparse and complex in this crop.
Appalachian Mountains
The ridges of the Appalachian mountain range emerge from the roads that avoid them (or follow their contours).
source : http://benfry.com/allstreets/map3.html
merci Facyla 🙂
