 The concurrency later changed to US 421 in September of same year (signage corrected by July 2009).The newest sections of Interstate 73 to be completed are the stretch of US 220 freeway in Asheboro, the remaining parts of the US 220 freeway designated Future I-73 in 1997, and the section from the Bryan Boulevard interchange northward back to US 220.The Asheboro section had several deficiencies that needed to be corrected before it could be designated an Interstate.