Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Interstate 73 (abbreviated I-73) is a main route of the intrastate Interstate Highway System, currently located entirely within the U.S. state of North Carolina. It is part of a longer planned corridor, defined by various Federal laws to run from Myrtle Beach, South Carolina, to Grayling, Michigan, but only the part south of West Virginia is currently under study. Closely related is the extension of Interstate 74 from Cincinnati, Ohio east to Myrtle Beach, South Carolina, with several concurrencies planned. There are currently two sections signed as I-73: 26 miles (42 km) along the U.S. Route 220 freeway in North Carolina, from south of Candor to south of Ulah (co-designated Interstate 74); 7.5 miles (12 km) along the southwestern portion of the Greensboro Urban Loop along with U.S. Route 421 from the Loop''s interchange with U.S. 220 to its interchange with Interstate 40 west of Greensboro, which opened February 21, 2008.