 From West Virginia east to I-81, US 460 also is part of the proposed Interstate 73.US 460 enters Buchanan County from Pike County, Kentucky, within the Cumberland Plateau, a multi-state dissected plateau that is part of the Appalachian Mountains.The U.S. Highway heads southeast as a two-lane road parallel to Norfolk Southern Railway's Buchanan Branch in the narrow valley of the Levisa Fork of the Big Sandy River.