What colors are used for STATE ROUTES signs in Delaware?

Answer: C — Black letters on a white circular background

STATE ROUTE signs in Delaware are characterized by black letters on a white circular background. This design is standardized to provide clear visibility and recognition. Such signage is crucial for guiding drivers along state routes throughout Delaware, ensuring they understand they are traveling on a designated state-managed road. The circular shape, combined with the contrasting color scheme, helps in quickly attracting attention and conveying important information to the driver. The other options do not conform to the standard for STATE ROUTE signage. For instance, red and white signs are typically associated with stop signs or regulatory warnings. Green and yellow may indicate informational or cautionary signs, respectively, but do not apply to state route identification. Similarly, black letters on a green circular background do not align with the established design for state routes, which is specifically defined as having a white background to enhance visibility against various environmental conditions.