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 items owned by FHWA. The California Department of Transportation logos consisting of the “CT” symbol and the “Caltrans” logotype are registered service marks and when used on any traffic control device they shall be presented in a uniform and consistent manner as outlined in the Department’s Deputy Directive DD-33-R1.
24 in by 24 in (610 mm by 610 mm) California-style U.S. Route shield, made to the specifications of the 2002 edition of Standard Highway Signs with 10 in (250 mm) numerals. Uses the Roadgeek fontsنسخة مؤرشفة في Wayback Machine. (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.)