U.S. route shield for Historic U.S. Route 6 in California.
Specifications: 24-by-36-inch (600 by 900 mm) California historic U.S. Route shield, made to the specifications of the 1999 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 Brown 469) and [2] (Pantone Cream 468), converted to RGB by [3].
http://www.dot.ca.gov/hq/traffops/signtech/signdel/specs/S18.pdf
California Department of Transportation