The portion of United States highway 75 from the junction of United States highway 75 and N.W. 46th street in Shawnee county, then south on United States highway 75 to the junction of United States highway 75 and interstate highway 70 is hereby designated as the John Armstrong memorial highway. Upon compliance with Kan. Stat. Ann. § 68-10,114, and amendments thereto, the secretary of transportation shall place highway signs along the highway right-of-way at proper intervals to indicate that the highway is the John Armstrong memorial highway.