The portion of United States highway 69 from the northern junction of United States highway 69 and K-52 highway in Linn county, then south on United States highway 69 to the southern junction of United States highway 69 and K-52 highway is hereby designated as the AMM2c Walter Scott Brown memorial highway. Upon compliance with Kan. Stat. Ann. § 68-10,114, and amendments thereto, the secretary of transportation shall place suitable signs to indicate that the highway is the AMM2c Walter Scott Brown memorial highway.