Appleyard Social Network Diagram
David Appleyard Livable Streets, Berkeley, CA: University of California Press, 1981

This celebrated diagram, illustrating the research of David Appleyard4, shows how social connections on a street are lost as traffic increases5; Appleyard measured the social connections within a set of streets in a US city; these are represented on the diagram by lines across & along the street. The three diagrams represent three streets, similar in most aspects but with varying traffic counts, as noted-