600 mm by 600 mm (24 in by 24 in) U.S. Route shield, made to the specifications of the 2004 edition of Standard Highway Signs, modified to include the narrow white border MoDOT includes on all their U.S. route shields, as seen in the Engineering Policy Guide. Uses the Roadgeek fonts. (United States law does not permit the copyrighting of typeface designs, and the fonts are meant to be copies of a U.S. Government-produced work anyway.)
Own work based on: US 60.svg
SPUI, Scott Nazelrod