High Quality Content by WIKIPEDIA articles! U.S. Route 127 is a 758-mile (1,220 km) long north–south United States highway in the eastern half of the United States. The southern terminus of the route is at U.S. Route 27 in Chattanooga, Tennessee. The northern terminus is at Interstate 75 near Grayling, Michigan. Since 1987, it has been the core of the annual World`s Longest Yard Sale, also known as the 127 Corridor Sale, which now stretches 675 Miles from Hudson, Michigan to Gadsden, Alabama. The sale, held every August, was created to demonstrate that the older US highway system has something to offer that the interstate system does not.