Silhouettes of the highway systems of a dozen major US cities. I produced these from OpenStreetMap data.
--- Joe Ganley
Washington, DC
Washington, DC
San Jose, CA
San Jose, CA
Chicago, IL
Chicago, IL
Houston, TX
Houston, TX
Baltimore, MD
Baltimore, MD
Seattle, WA
Seattle, WA
Charlotte, NC
Charlotte, NC
Boston, MA
Boston, MA
Los Angeles, CA
Los Angeles, CA
Indianapolis, IN
Indianapolis, IN
Dallas, TX
Dallas, TX
Phoenix, AZ
Phoenix, AZ