What colors are used for Interstate Route markers?

Interstate Route markers are designated using a specific color scheme to make them easily recognizable to drivers. The correct colors for Interstate Route markers are red, white, and blue. The shield shape of the markers is filled in with blue, and features a white border with the route number displayed in white lettering on the blue background. Furthermore, the sectional top of the sign may be red, which is consistent with the color scheme mandated by federal standards for Interstate signage.

The other options do not represent the correct colors used for Interstate markers, as green and yellow are typically used for guidance and caution signs respectively, blue and white are reserved for informational signs, and black and white are often used for regulatory signs. Understanding these color distinctions is essential for safe navigation on the highways.