Mo. Rev. Stat. § 227.315: Payne Stewart Highway, portion of Interstate Highway 44 in Springfield (Greene County) designated as.

The portion of Interstate Highway 44, from the Highway 65 exit on the east side of a city having a population of at least one hundred forty-nine thousand which is located in a noncharter county of the first classification with a population of at least two hundred seven thousand to the Highway 160 exit on the west side of a city having a population of at least one hundred forty-nine thousand which is located in a noncharter county of the first classification with a population of at least two hundred seven thousand shall be designated the "Payne Stewart Highway".