English: 1960 style Arizona State Highway Department spec U.S. Highway shield, color coded based on direction. Style used between 1960 and 1963. Brown is east, blue is west, orange is north and green is south.
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.
No provisions of the supplement supersede this provision of the MUTCD.