600 mm by 600 mm (24 in by 24 in) Future Interstate shield, made to the specifications of the 2004 edition of
Standard Highway Signs
(sign M1-1). Uses the
Roadgeek 2005 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.) Colors are from
[1]
(Pantone Red 187 and Blue 294), converted to RGB by
[2]
. 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.
Any traffic control device design or application provision contained in this Manual shall be considered to be in the
public domain
. Traffic control devices contained in this Manual
shall not be protected by a patent, trademark, or copyright
, except for the Interstate Shield and any other items owned by FHWA.