 At the same time, SR 13, part of what would become part of the current route of US 23/US 441/SR 15/SR 365, was built, and paved, from Cornelia to Toccoa.By 1926, the section from Cornelia to Clarkesville was paved.Between 1929 and 1932, US 23 was designated along SR 15 from Cornelia to the North Carolina state line.