English: 16x16 U.S. route shield approximated to the 1948 standards, modified to California specifics. (Some dimensions are not 100% accurate as the symbol and fonts were resized to match photographs of actual shields.)
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.
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