A routed highway that is maintained at the county level. These roads are mostly signed on a pentagon shield with yellow text on blue background. Variations exist such as where Wisconsin uses lettered rectangles for county trunk highways, West Virginia with circle shields for their county routes and Missouri&apos;s lettered routes posted on square markers.<br>
County routes originated in 1958 with the formation of the California County Route Marker Program. Signs were designed to display the county and route number in a blue and gold color scheme for California. Routes were established to mark routes of major importance that were of general public interest, built to sufficient standards and with a logical beginning and end point. The success of the program in California led its adoption as the National Uniform County Route Marker Program by the National Association of Counties (NACO) in 1967. The blue and gold sign style remained the same and continues through today. More on the origins of the County Road pentagon and the source for our description is found here.