What is the purpose of the US Route sign?

The purpose of the US Route sign is to show federal highways. These signs indicate the highways that are part of the national system of highways designated by the federal government. This system is designed to facilitate long-distance travel across states and provide a consistent means of identifying major routes that connect various regions of the country. The US Route signs are easily recognizable, typically featuring a black and white shield shape, which helps drivers understand they are on a significant federal route. This is important for navigation, as it allows travelers to plan their journeys along well-maintained and critical corridors for interstate travel.

Directing local attractions or state-specific routes falls outside the primary purpose of US Route signage. While US Routes may indirectly help guide traffic towards nearby cities, their main function is to denote federal highway status, making option B the most accurate choice.