US 421 (NC)
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Route of US 421 in North Carolina highlighted in red
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| Route information | ||||
| Maintained by NCDOT | ||||
| Length: | 328 mi (528 km) | |||
| Existed: | 1931 – present | |||
| Major junctions | ||||
| South end: | Fort Fisher | |||
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| North end: |
  US 421 / SR 34 at the Tennessee line |
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| Location | ||||
| Counties: | New Hanover, Brunswick, Pender, Sampson, Harnett, Lee, Chatham, Randolph, Guilford, Forsyth, Yadkin, Wilkes, Watauga | |||
| Highway system | ||||
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U.S. Route 421 (US 421) traverses approximately 328 miles (528 km) across North Carolina; from Fort Fisher, on Pleasure Island between the Atlantic Ocean and Cape Fear River, to the Tennessee state line near the community of Zionville. The highway is nominally labeled "north" and "south" throughout North Carolina, though it really follows a general northwest-southeast path, and the segment from Greensboro to Boone is almost due east-west, with compass west corresponding to the signed north direction.
A majority of the highway is part of the North Carolina Strategic Highway Corridors system. Because of this designation, the state has made numerous changes converting a rural two-lane highway into a major freeway/expressway with 4 or more lanes. Numerous former segments of the highway named "Old U.S. Route 421" are found along the entire route.
US 421 starts at a parking/dock area on the Cape Fear side of Pleasure Island; within one-quarter mile (0.40 km), the Fort Fisher Ferry Terminal is located where travelers can ride a ferry to North Carolina Highway 211 (NC 211) and Southport. Immediately after the ferry terminal is the Fort Fisher State Recreation Area, where the first and second battles of Fort Fisher took place.
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