| skos:altLabel | - 21
- :U.S. Route 21
- Byp. US 21
- U.S. 21
- U.S. Highway 21
- U.S. Route 21#History
- U.S. Route 21#North Carolina
- U.S. Route 21#South Carolina
- U.S. Route 21#Virginia
- U.S. Route 21
- U.S._Route_21
- US 21
- US Highway 21
- US Route 21
- US Route 21
- US 21
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