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United States Numbered Highway System
U.S. Highways in Tennessee
Transportation in Blount County, Tennessee
Transportation in Avery County, North Carolina
Transportation in Burke County, North Carolina
Transportation in Caldwell County, North Carolina
Transportation in Watauga County, North Carolina
Transportation in Bamberg County, South Carolina
Transportation in Chester County, South Carolina
Transportation in Fairfield County, South Carolina
Transportation in Hampton County, South Carolina
Transportation in Lexington County, South Carolina
Transportation in Orangeburg County, South Carolina
Transportation in Richland County, South Carolina
Transportation in York County, South Carolina
U.S. Highways in North Carolina
U.S. Highways in South Carolina
U.S. Route 21
Transportation in Gaston County, North Carolina
Transportation in Jasper County, South Carolina
Transportation in Carter County, Tennessee
Transportation in Catawba County, North Carolina
Transportation in Cocke County, Tennessee
Transportation in Greene County, Tennessee
Transportation in Johnson County, Tennessee
Transportation in Lincoln County, North Carolina
Transportation in Loudon County, Tennessee
Transportation in Sevier County, Tennessee
Transportation in Washington County, Tennessee

U.S. Route 321: page information

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CreatedJun 19, 2026, 9:45 AM

UpdatedJun 19, 2026, 9:45 AM