Image:I-680 (CA).svg

25 in by 30 in (635 mm by 762 mm) Interstate shield, made to the specifications of the 1971 Caltrans sign drawing (still in use). 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 and a color of black so it shows up; in reality, signs have no outside border.

[edit] Licensing

I, Vishwin60, the creator of this image, hereby release it into the public domain. If that cannot be done for any reason, including the nonexistence of a way to release a work into the public domain, I release it (or my changes in the case of a derivative work) under the following licenses: Copyleft: this work of art is free, you can redistribute it and/or modify it according to terms of the Free Art License. You will find a specimen of this license on the site Copyleft Attitude http://artlibre.org/licence/lal/en/ as well as on other sites. The copyright holder of this image allows anyone to use it for any purpose including unrestricted redistribution, commercial use, and modification. This file is licensed under Creative Commons ShareAlike 1.0 License