60-2-125. Definitions. As used in Title 60, chapter 2, part 1, and Title 60, chapter 3, part 2, unless otherwise provided, the following definitions apply:
(1) "Federal-aid highway funds" means those funds made available for expenditure by the department pursuant to Title 23, U.S.C.
(2) "National highway system" means the system of public highways designated by the commission and approved by the secretary of transportation as provided in Title 23, U.S.C.
(3) "Primary highway system" means the highways that have been functionally classified by the department as either principal or minor arterials and that have been selected by the commission to be placed on the primary highway system.
(4) "Secondary highway system" means the highways that have been functionally classified by the department as either minor arterials or major collectors and that have been selected by the commission, in cooperation with the boards of county commissioners, to be placed on the secondary highway system.
(5) "State highways" means the highways throughout the state that are not located on a defined highway system but that are on the state maintenance system.
(6) "Urban highway system" means the highways and streets that are in and near incorporated cities with populations of over 5,000 and within urban boundaries established by the department, that have been functionally classified as either urban arterials or collectors, and that have been selected by the commission, in cooperation with local government authorities, to be placed on the urban highway system.