Ancient Web: Andrew Turnbull Cataloged How American Traffic

Andrew Turnbull's Field Guide to American Traffic Signs traces regulatory, warning, and guide-sign designs through decades of MUTCD history, including obsolete signs and transitional designs that have mostly disappeared from the road.

https://switchboardtechservices.com/articles/ancient-web-andrew-turnbull-cataloged-how-american-traffic-signs-changed/

By Switchboard Tech Services · Originally published 2026-05-23

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