How are different roadways prioritized according to the specified order?

The prioritization of different roadways is critical for managing traffic flow, maintenance allocation, and emergency responses. The correct answer reflects a comprehensive understanding of the hierarchy of roadways based on their significance and usage.

Interstate highways represent the highest tier in this hierarchy. They are designed for long-distance travel and facilitate interstate commerce, leading to their prioritization for maintenance and upgrades. Following the interstate system, US primary roads are critical for regional connectivity and serve as major avenues to access various urban and rural areas.

State primary roads come next in importance, as they typically connect smaller towns and rural communities to larger cities and interstate systems, offering vital links within state infrastructures. Secondary roads follow, providing access to less populated areas and supporting local traffic needs. City or county roads are at the bottom of this hierarchy because they primarily serve local traffic, residential access, and the daily needs of communities, making them a lower priority in terms of resources and maintenance compared to higher-tier roads.

In summary, the correct answer correctly illustrates the established order of roadway prioritization based on the significance of each type of road in facilitating transportation and connectivity.