Which color is designated for a black on orange detour sign?

The designation of the color used for a black on orange detour sign is closely tied to the need for clear communication and visibility in work zone environments. Black on orange signs signify that a route is unnumbered and generally provide critical information about temporary detours that may not be part of the regular highway numbering system. This helps drivers navigate through areas affected by construction or maintenance, ensuring they are informed about altered routes in a straightforward way.

In the context of work zone safety, using specific colors and formats helps drivers quickly identify the type of road condition or detour they are encountering. The choice of orange as a background color conveys urgency and attracts attention, while the black lettering provides clarity and contrast for maximum legibility.