This image is a representation of a 1950's technicolor U.S. Route shield used by Arizona. Each color meant a different direction. Brown meant East, Green meant South, Orange meant North and Blue meant West. Arizona replaced the signs with traditional Black and White shields in the late 50's early 60's.
File:US XX Arizona 1954 South.svg
Matthew Anderson (Base template modified from original File:US blank (1961).svg by Fredddie)