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.

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 road with an all-weather surface (e.g., gravel road, city-street, or a paved highway) suitable for year-round automobile travel.

A type of highway that has partial limited access from adjacent and parallel roads.

A type of highway that has limited access and is grade separated.