24 in by 24 in (600 mm by 600 mm) Texas State Highway shield (toll), made to the specifications of the sign detail (sign M90-1). 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 (1/16 in) and a color of black so it shows up; in reality, signs have no outside border. The width of the upper right side of the flag is not specified; I chose 2 (1/8 in).
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 or the State of Texas.
Texas Manual on Uniform Traffic Control Devices, Revision 2, October 2014, Introduction, Page I-1. [3]
To the extent that they are incorporated by specific reference, the latest editions of the following publications, or those editions specifically noted, shall be a part of this Manual: "Standard Highway Sign Designs for Texas" book (TxDOT); and "Color Specifications for Retroreflective Sign and Pavement Marking Materials" (appendix to subpart F of Part 655 of Title 23 of the Code of Federal Regulations).
Texas Manual on Uniform Traffic Control Devices, Revision 2, October 2014, Part 1, Section 1A.11 (Relation to Other Publications). [4]
Standard Highway Signs document has been revised to change the background color of toll highway signs to blue. See page 6 of ftp://ftp.dot.state.tx.us/pub/txdot-info/library/pubs/gov/sign/6_toll.pdf)