The system of state roads designated by the Transportation Commission, including necessary urban extension, the responsibility for which is lodged in the Department of Transportation.

Laws 1968, HB 501, c. 415, § 242, emerg. eff July 1, 1968; Amended by Laws 2024, SB 1923, c. 35, § 7, eff. November 1, 2024 (superseded document available).