U.S. Route 321 Business (Winnsboro, South Carolina)

U.S. Route 321
Route information
Auxiliary route of US 21
Length	516.9 mi (831.9 km)
Existed	1931 – present
Tourist routes	Western York Scenic Byway
Major junctions
South end	US 17 in Hardeeville, SC
	I-26 in Cayce, SC I-20 in Columbia, SC I-85 in Gastonia, NC I-40 in Hickory, NC I-26 / US 19W / US 23 in Johnson City, TN I-40 in Newport, TN I-75 in Lenoir City, TN
North end	I-40 / SR 73 / SR 95 near Lenoir City, TN
Location
States	South Carolina, North Carolina, Tennessee
Counties	SC: Jasper, Hampton, Allendale, Bamberg, Orangeburg, Lexington, Richland, Fairfield, Chester, York NC: Gaston, Lincoln, Catawba, Burke, Caldwell, Watauga, Avery TN: Carter, Washington, Greene, Cocke, Sevier, Blount, Loudon
Highway system
United States Numbered Highway System List Special Divided Replaced ← SC 319 SC SC 322 → ← US 311 NC NC 343 → ← SR 320 TN SR 321 →

North Carolina Highway 17
Location	Propst Crossroads–Boone, NC
Length	55.9 mi (90.0 km)
Existed	1921–1934

North Carolina Highway 155
Location	Dallas–Conover, NC
Length	29.4 mi (47.3 km)
Existed	1994–1999

U.S. Route 321 Business
Location	Winnsboro, South Carolina
Length	4.2 mi (6.8 km)
Existed	1952–present

U.S. Route 321 Business
Location	Chester, South Carolina
Length	3.7 mi (6.0 km)
Existed	1964–present

U.S. Route 321 Business
Location	York, South Carolina
Length	2.5 mi (4.0 km)
Existed	1958–present

U.S. Route 321 Business
Location	Dallas–Hickory, NC
Length	37.2 mi (59.9 km)
Existed	1999–present

U.S. Route 321A
Location	Lincolnton, North Carolina
Length	3.4 mi (5.5 km)
Existed	1956–1960

U.S. Route 321A
Location	Granite Falls–Lenoir, NC
Length	11.8 mi (19.0 km)
Existed	1948–present

U.S. Route 321A
Location	Lenoir, North Carolina
Length	5.9 mi (9.5 km)
Existed	1941–1948

U.S. Route 321 (US 321) is a spur of U.S. Route 21. It runs for 516.9 miles (831.9 km) from Hardeeville, South Carolina to Lenoir City, Tennessee; with both serving as southern termini. It reaches its northernmost point at Elizabethton, Tennessee. Because of its unusual "north–south–north" routing, U.S. Route 321 intersects both Interstate 40 and U.S. Route 70 three separate times. The highway serves different roles in each state: An alternate route to interstates in South Carolina, a major highway in North Carolina, and a scenic route in Tennessee.

U.S. 321 provides direct access between Savannah and Columbia, serving as an alternate to Interstate 95 and Interstate 26. Starting in Hardeeville, U.S. 321 as a mostly 2 lane highway goes through sparsely populated areas and small towns including Estill, Fairfax, and Denmark, heading in a rather straight and northward direction into the Columbia area, widening to a 5 lane highway right after Neeses, then narrowing down to a 2 lane highway right after the town of North and widening to a 5 lane highway again after Swansea and staying that way until it merges with its parent route U.S. 21 in Dixiana. In Columbia, the route stays concurrent with U.S. 21 through Cayce, over the Congaree River on the Blossom Street Bridge, turning left onto Huger Street, right onto Elmwood Avenue, and left onto North Main Street. The roads separate at Hyatt Park, with U.S. 321 staying west of Interstate 77 and U.S. 21 north of Columbia. The route goes through to communities of Winnsboro, Chester, York, and Clover before entering North Carolina at Bowling Green.

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Wikipedia