At a meeting held on June 8, 1931, the American Association of State Highway Officials (AASHO) approved an extension of U.S. Route 93 through Nevada. This extension brought the southern end of that route from Wells to Glendale. South of Ely, the extension of US 93 was routed over State Route 7, including the portion northwest of Glendale. AASHO ordered another southerly extension of US 93 to Arizona via Las Vegas in 1935, which was signed by 1939. The routing of US 93 via the Glendale–Moapa segment remained in place until 1967. In that year, a shorter route connecting Las Vegas and Caliente was completed, bypassing Glendale. The of highway northwest of Glendale remained in the state highway system, still marked as State Route 7.