Mo. Rev. Stat. § 226.795
State Highway 19 is hereby designated as a rustic and scenic road dedicated to enjoyment of the scenic beauty of the area of the state of Missouri adjoining that highway. The department of transportation may place suitable markings and informational signs along state Highway 19. The department of transportation, the department of natural resources and the Mississippi River Parkway commission may cooperate in the designation of state Highway 19 as a rustic and scenic road to protect and preserve a part of Missouri's transportation history, historic roads and cultures, recreational driving, beauty, trees, vegetation and wildlife heritage by developing protective standards for maintenance, preservation, identification and utilization of state Highway 19.
§ 226.795, RSMo