Self-created interchange diagrams

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Maps created using Inkscape using OpenStreetMap data and Interstate/U.S./state highway shields from Wikipedia.

Self-created road maps

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Maps created using Inkscape using U.S. and state highway shields and county outlines from Wikipedia.

Other self-created maps

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Userboxes

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A, B, and CThis user prefers the serial comma.
sar-NThis user is a native speaker of sarcasm. Isn't that just great?
PerlThis user is just another Perl hacker.
 
This user contributes using a Mac, and doesn't know why Windows was ever invented.
GThis user will use Google before asking dumb questions.
 This user hacks happily with Emacs.
  This user has a keen interest in physics.
  This user only partially understands mathematics.
SI*This user is competent in metric units but prefers not to use them.
 This user is from Illinois.
BBCThis user supports the BBC.
KUAThis user is a friend of the Buckets (pronounced Bouquet).
EThis user reads The Economist.
 This user edits articles about South Carolina Highways.
 This user is a member of the Maps Department for the U.S. Roads WikiProject.
 This user is a member of
WikiProject Chicago.
ubx-5This user uses entirely too many userboxes.