US 421 (NC) Intersections with interstate highways 2025-10-25 Roadnow US 421 (NC) Intersections with interstate highways MAP I-77, near Hamptonville, Iowa map • nearbyMAP I-40, near Winston Salem, Iowa map • nearbyMAP I-40 map • nearbyMAP I-85, near Greensboro, Iowa map • nearbyMAP I-40, near Winston Salem, Iowa map • nearbyMAP I-40, near Winston Salem, Iowa map • nearby
