The durable surface material laid down on a road intended to carry vehicular traffic. Although cobblestones, brick, wood plank, and other types of surface treatment were used in the past, most road su [..]

A public road built or maintained by a county government rather than the state government (e.g., Mohave County Route 20, MC 20).

A public road between two places that typically has been paved or otherwise improved to allow travel by motorized vehicles. Technically, it includes the entire area within the right-of-way.

In Arizona, the entire group of numbered state highways and U.S. highways built between 1912 and 1955, when the Federal-Aid Highway Act of 1956 was signed. Each road in the system is considered a hist [..]

The system of U.S. interstate and defense highways established with the Federal-Aid Highway Act of 1956.The numbering pattern for interstate highways is the reverse of that used for U.S. highways: Odd [..]

A road built or maintained by private citizens, not municipal, state, or federal entities that may be closed to public traffic.

A public road maintained by a state that carries a number assigned by that state (e.g., Arizona State Route 82, SR 82).

The entire group of numbered state highways and U.S. highways that is the primary responsibility of the state to maintain. The system includes the right-of-way, drainage facilities, bridge appurtenanc [..]

A public road maintained by a state that carries a number assigned by the American Association of State Highway and Transportation Officials (AASHTO).

The system of U.S. highways numbered within a nation-wide grid that is maintained by state or location governments. The system was established in 1926. The numbers and locations are coordinated by the [..]