750 mm by 600 mm (30 in by 24 in) Massachusetts Route shield, made to the specifications of the <a rel="nofollow" class="external text" href="http://166.90.180.162/mhd/downloads/manuals/1996Mconst.pdf">1996 edition of Construction and Traffic Standard Details</a> (sign M1-5). Uses the <a rel="nofollow" class="external text" href="http://www.triskele.com/fonts/index.html">Roadgeek 2005 fonts</a>. (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.) The outside border has a width of 1 (1 mm) and a color of black so it shows up; in reality, signs have no outside border. The specs actually do not show the curve on the outside border, instead making it a perfect rectangle, but all signs I have seen round the corners.
<a href="//commons.wikimedia.org/wiki/User:SPUI~commonswiki" title="User:SPUI~commonswiki">SPUI</a>
<span class="int-own-work" lang="en">Own work</span>