High Intensity and Diamond Grade Signs Meet DOT and MUTCD State and Federal Guidelines
MUTCD Information: Certain roads have been designated by the U.S. Secretary of Transportation as National Scenic Byways or All-American Roads based on their archeological, cultural, historic, natural, recreational, or scenic qualities. If used, the D6-4 or D6-4a sign shall be placed such that the roadway route signs have primary visibility for the road user.