U.S. Route 21

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U.S. Route 21 marker

U.S. Route 21
Route information
Length:394 mi[2][3][4] (634 km)
Existed:1926[1] – present
Major junctions
South end:Hunting Island State Park, SC
  I-95 near Yemassee, SC
I-26 (three times in SC)
I-20 in Columbia, SC
I-77 (numerous times in SC/NC)
I-85 in Charlotte, NC
I-40 in Statesville, NC
North end: I-81 / US 52 in Wytheville, VA
Highway system



I-20SCSC 22
NC 20NCNC 22
SR 20VASR 22
 
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U.S. Route 21 marker

U.S. Route 21
Route information
Length:394 mi[2][3][4] (634 km)
Existed:1926[1] – present
Major junctions
South end:Hunting Island State Park, SC
  I-95 near Yemassee, SC
I-26 (three times in SC)
I-20 in Columbia, SC
I-77 (numerous times in SC/NC)
I-85 in Charlotte, NC
I-40 in Statesville, NC
North end: I-81 / US 52 in Wytheville, VA
Highway system



I-20SCSC 22
NC 20NCNC 22
SR 20VASR 22

U.S. Route 21 (US 21) is a north–south United States Numbered Highway that runs 394 miles (634 km) from Hunting Island State Park, South Carolina to Wytheville, Virginia.

Route description[edit]

South Carolina[edit]

US 21 travels 233.2 miles (375.3 km) through the state. Beginning at Hunting Island State Park, US 21 travels west toward Beaufort, where it widens to four lanes. The route bypasses Beaufort to the south, going through Port Royal, Shell Point, and Burton. In the Beaufort area, US 21 passes by the entrances to Parris Island and MCAS Beaufort, the major Marine Corps installations in the area. North of Beaufort, US 21 continues as a four-lane divided highway and intersects with US 17. The route travels in a wrong-way concurrency with US 17 south for seven miles (11 km) before turning north towards Yemassee, South Carolina, where it becomes a rural two-lane road and intersects with US 17 Alternate. North of Yemassee, US 21 splits off and crosses Interstate 95 (I-95) at exit 42.

The two-lane route continues through rural portions of the state. US 21 goes through Smoaks and Branchville, South Carolina and bypasses Orangeburg. North of Orangeburg, US 21 runs roughly parallel to I-26 until Gaston where it conjoins US 321 and becomes an urban highway. US 21 passes through Cayce, West Columbia, and Columbia (passing by the State House).

North of Columbia, US 21 splits from US 321, reverting to a rural two-lane road parallel to I-77. In York County, US 21 enters urban areas again, connecting Rock Hill and Fort Mill. Near the North Carolina state line, US 21 merges with I-77 near Carowinds, then enters North Carolina.

North Carolina[edit]

US 21 begins as a concurrency with I-77, which it repeats three times within the state. Its first break with I-77 is along Statesville Avenue, then proceeding through Huntersville and Cornelius, however, because of its close proximity to I-77 and North Carolina Highway 115 (NC 115), it has no interchange with I-485. The second break with I-77 occurs at Mooresville, where US 21 travels through the city and then northwest into Statesville. After Statesville, US 21 travels northeast to Harmony and Brooks Crossroads, before merging back with I-77 near Jonesville. North of Elkin, US 21 splits with I-77 for the last time and goes north to Sparta, passing the Blue Ridge Parkway after a major, curvy section. North of Sparta, at Twin Oaks, US 221 overlaps with US 21 before entering Virginia. US 21 travels 124.5 miles (200.4 km) through the western Piedmont of North Carolina, either combined with I-77 or as a two-lane rural road; from the South Carolina state line to Elkin, travelers can easily skip a majority of US 21 via I-77.

Virginia[edit]

After a few miles crossing the state line, US 21 reaches the town of Independence, where it splits with US 221 and continues north. The route goes through the Mount Rogers National Recreation Area before entering the city of Wytheville. After a short concurrency with US 11 in downtown Wytheville, it goes north and ends at the intersection of I-81/US 52. US 21 travels 35 miles (56 km) through western Virginia, mostly as a two-lane rural mountain road.

History[edit]

End of US 21 at Hunting Island, SC

US 21 in the pre-Interstate era was a north–south highway connecting the area around Lake Erie and the coastal South. One of the few true north–south routes to cross the middle Appalachian Mountains, it became an important corridor for motor traffic between northeastern Ohio, western Pennsylvania, (with US 19) and western New York state and central North Carolina, central and southeastern South Carolina, and by connecting with other highways, coastal Georgia and most of Florida.

US 21 originally (in 1926) connected Cleveland, Ohio, and Yemassee, South Carolina. In 1935 it was extended to Beaufort, South Carolina, and again in 1953 to its current southern terminus at the Atlantic Coast at Hunting Island State Park, between the city of Beaufort and Fripp Island.[5]

In the Interstate Highway era much of US 21 became an obvious corridor for a long-distance expressway. The West Virginia Turnpike between Charleston, West Virginia, and Princeton, West Virginia, was the first segment of a planned series of toll highways along or near US 21 from Cleveland to Charlotte, North Carolina. All of the other toll highways were shelved in favor of freeways built with Interstate funding; these freeways and the West Virginia Turnpike became I-77, which completely supplanted old US 21 as a long-distance through route. I-77 was later extended to Columbia, South Carolina, also within a few miles of US 21.

Between Cleveland and Charleston, all but a relatively short segment of US 21 was completely deleted in favor of I-77, the relics being State Route 21 (SR 21) and SR 821 between Byesville and Marietta, Ohio. The section of US 21 between Mineral Wells and Charleston is now signed as County Route 21 in all four counties along the route (Wood, Wirt, Jackson, and Kanawha).

Between Charleston and its current northern terminus at Wytheville, Virginia, almost all of US 21 coincided with either US 60, US 19, or US 52, which remained as US 21 was deleted. The short segment of US 21 in southern West Virginia not coinciding with another U.S. Highway became an extension of West Virginia Route 16.

In North Carolina, US 21 originally entered the state along today's NC 51 into Pineville, then followed Old Pineville Road into Charlotte. In the mid-1930s, US 21 moved over to South Boulevard from Old Pineville Road. In 1969, US 21 was rerouted following today's I-77 alignment, the old route was replaced by an extension of US 521. From 1975–87, US 21 moved north in segments onto I-77 to its current alignment ending at exit 16A (Sunset Road). Further north, US 21 originally followed Old Statesville Road, replaced in 1956 by NC 115. In 1966, US 21 was bypassed around Jonesville and Elkin, replaced with US 21 Business.[6]

Junction list[edit]

CountyLocationMile[2][3][4]kmExitDestinationsNotes
Beaufort 0.00.0Hunting Island State ParkUS 21 begins at intersection of walking trail, road continues south to Fripp Island
Beaufort14.423.2
US 21 Bus. north / SC 802 east
17.327.8 SC 281 north (Ribaut Road)
19.831.9Malecon Drive – Parris Island
21.033.8 SC 128 west (Savannah Highway) – Bluffton, Hardeeville, Hilton Head Island
24.138.8 SC 170 west – Beaufort
25.340.7
US 21 Bus. south – Beaufort
26.743.0 SC 116 west – Laurel Bay
Gardens Corner37.360.0 US 17 north (Charleston Highway) – CharlestonNorth end of US 17 overlap
Pocotaligo43.970.7
US 17 south / US 17 Alt. north – Ridgeland, Yemassee
South end of US 17 and US 17 Alt. overlap
HamptonYemassee47.776.8 SC 68 west (Yemassee Highway) – Varnville, Hampton
Colleton 51.382.6
US 17 Alt. north (Hendersonville Highway) – Walterboro
North end of US 17 Alt. overlap
 54.086.9 I-95 – Florence, Savannah
 63.9102.8 SC 63 (Sniders Highway) – Varnville, Walterboro
 70.3113.1 SC 64 (Bells Highway) – Ehrhardt, Walterboro
Smoaks79.0127.1 SC 217 (Lodge Highway) – Lodge
Bamberg 85.0136.8 SC 61 (Edisto River Road) – Bamberg
OrangeburgBranchville90.7146.0 US 78 west (Edward Street) – BambergWest end of US 78 overlap
90.9146.3 US 78 east (Dorange Road) – CharlestonEast end of US 78 overlap
91.3146.9 SC 210 north – Bowman
Orangeburg106.3171.1
US 21 Bus. north (Rowesville Road)
106.4171.2
US 178 east (Charleston Highway) / US 178 Bus. – Summerville, Charleston
East end of US 178 overlap
107.7173.3 US 301 (Five Chop Road) – Santee
108.8175.1 SC 33 (Russel Street) – Cameron
109.6176.4 US 601 (Magnolia Street) – St. Matthews
110.8178.3
US 178 (Chestnut Street) / US 21 Bus. (Columbia Road) – North
West end of US 178 overlap
Calhoun 122.5197.1 SC 6 south (Cawcaw Road) / SC 172 west (Bull Swamp Road) – St. Matthews, NorthSouth end of SC 6 overlap
 124.4200.2 SC 6 north (Center Hill Road) – SwanseaNorth end of SC 6 overlap
Lexington 129.5208.4 I-26 – Columbia, Charleston
Calhoun 132.2212.8 US 176 east (Old State Road) – St. MatthewsEast end of US 176 overlap
Lexington 139.3224.2 I-26 – Columbia, Charleston
 141.0226.9 US 321 south – Gaston, SwanseaSouth end of US 321 overlap
Cayce143.5230.9 To I-77 (Fish Hatchery Road) – Charlotte
143.9231.6 I-26 – Charleston, Spartanburg
145.1233.5 SC 2 north (Frink Road)
West Columbia146.6235.9 SC 302 south (Airport Boulevard) – Aiken, Columbia Airport
148.3238.7 SC 2 (State Street)
RichlandColumbia149.8241.1 US 1 / US 378 (Gervais Street)To South Carolina State House
150.2241.7 SC 12 (Hampton/Tylor Streets)To Finlay Park and Columbia Museum of Art
150.7242.5 I-126 west / US 76 west – Greenville, SpartanburgWest end of US 76 overlap
151.7244.1 US 76 east (Elmwood Avenue)East end of US 76 overlap
151.9244.5 US 176 west (River Drive)West end of US 176 overlap
152.6245.6 SC 16 (Sunset Drive)
153.1246.4 SC 215 north (Montichello Road)To Columbia International University
154.1248.0 US 321 north (Fairfield Street)
156.6252.0 I-20 – Florence, Augusta
 164.1264.1 I-77 – Columbia, Charlotte
 165.3266.0 SC 555 (Farrow Road) – Columbia
FairfieldRidgeway173.8279.7 SC 34 east (Palmer Street) – Lugoff, CamdenEast end of SC 34 overlap
174.1280.2 SC 34 west (Church Street) – Winnsboro MillsWest end of SC 34 overlap
 190.7306.9 SC 200 – WinnsboroSouth end of SC 200 overlap
ChesterGreat Falls193.7311.7 SC 99 north (Chester Avenue) – Richburg
194.8313.5 SC 97 north – ChesterNorth end of SC 97 overlap
195.0313.8 SC 97 south / SC 200 north – LancasterSouth end of SC 97 and north end of SC 200 overlap
Fort Lawn202.6326.1 SC 9 (Chester Avenue) – Richburg, Lancaster
 207.9334.6 SC 223 (Wylies Mill Road) – Richburg
YorkLesslie215.2346.3 SC 5 south – Lexington
Rock Hill218.9352.3Springfield Road – LesslieExit ramps not clearly marked
219.7353.6 I-77 – Columbia, Charlotte
220.2354.4 SC 5 north (Main Street)North end of SC 5 overlap
220.5354.9 SC 121 south (Cowan Road)South end of SC 121 overlap
221.7356.8 SC 122 (Dave Lyle Boulevard)
224.0360.5 SC 322 west (Cherry Road)North end of SC 121 overlap
224.5361.3 I-77 / SC 161 west (Celanese Road) – Columbia, Charlotte
Fort Mill226.0363.7
US 21 Bus. north (Spratt Street) / Sutton Road
228.0366.9 SC 160 – Tega Cay
230.8371.4 SC 460 (Springfield Parkway) – Tega Cay, Fort Mill
232.0373.4
US 21 Bus. south (Old Nation Road)
232.7374.5 SC 51 north (Pineville-Rock Hill Road) – Pineville
233.3375.5 I-77 south / Carowinds Boulevard – ColumbiaSouth end of I-77 overlap; to Carowinds
 234.1
0.0
376.7
0.0
South CarolinaNorth Carolina state line
MecklenburgCharlotte0.91.41AWestinghouse BoulevardFormerly exit 1 before August 2010
1.82.91B I-485 – Huntersville, PinevilleFormerly exit 2 (southbound) before August 2010
2.84.53Arrowood RoadFormerly exit 2 (northbound) before August 2010
3.76.04Nations Ford Road
4.87.75Tyvola Road
6.09.76AWoodlawn Road south – Queens UniversityTo Pfeiffer University
6.210.06B NC 49 (South Tryon Street) / Billy Graham ParkwayTo Billy Graham Library
7.311.77 To NC 49 / Clanton Road
8.313.48 To NC 160 / Remount RoadNorthbound exit and southbound entrance
9.014.59A NC 160 (West Boulevard)Southbound exit and northbound entrance
9.415.19B I-277 north (John Belk Freeway) / US 74 east
9.515.39C US 74 west (Wilkinson Boulevard)
9.915.910A US 29 / NC 27 (Morehead Street)Northbound exit is via exit 9C
10.416.710Trade Street / Fifth StreetSigned as exits 10B (Trade Street east) and 10C (Trade Street west, Fifth Street) southbound
11.017.711A I-277 south / NC 16 south (Brookshire Freeway east) – Downtown Charlotte
11.218.011B NC 16 north (Brookshire Freeway west)Northbound left exit
12.420.012Lasalle Street / Atando Avenue
13.321.413 I-85 – Greensboro, SpartanburgSigned as exits 13A (north) and 13B (south)
15.825.416 I-77 north – StatesvilleNorth end of I-77 overlap
16.326.2 NC 155 north (Old Statesville Road)
18.930.4 NC 24 (W.T. Harris Boulevard)To Northlake Mall
Huntersville25.741.4 NC 73 (Sam Fur Road) – Concord
Cornelius28.846.328 I-77 south – CharlotteSouth end of I-77 overlap
Davidson30.248.630Davidson, Davidson College
IredellMooresville32.151.731Langtree Road
33.754.233 I-77 north – StatesvilleNorth end of I-77 overlap
36.458.6 NC 150 (Plaza Drive)
39.162.9 NC 155 south (Statesville Highway)South end of NC 155 overlap
 43.369.7 I-77 – Charlotte, Statesville
Statesville51.282.4 US 70 (Garner Bagnal Boulevard) – Conover, Salisbury
51.983.5 US 64 west (Front Street) / NC 115 north (Center Street)West end of US 64 and north end of NC 115 overlap
52.384.2 NC 90 west (Water Street)
53.285.6 US 64 east (Davie Avenue) – MocksvilleEast end of US 64 overlap
54.187.1 I-40 – Hickory, Winston-Salem
 57.292.1 I-77 – Statesville, Elkin
Harmony66.9107.7 NC 901 (Memorial Highway) – Union Grove
YadkinBrooks Crossroads79.2127.5 US 421 – Wilkesboro, Yadkinville, Winston-Salem
 85.4137.479
I-77 south / US 21 Bus. north – Statesville, Jonesville
South end of I-77 overlap
Jonesville88.5142.482 NC 67 – Jonesville, Boonville, Elkin
SurryElkin90.3145.383 I-77 north – WythevilleNorth end of I-77 overlap; southbound exit and northbound entrance
91.3146.9 NC 268 – ElkinTo Elkin Municipal Airport
92.8149.3
US 21 Bus. south / Popular Springs Road – Elkin
Northbound turn left on Popular Springs Road to US 21 Business
Alleghany 111.2179.0Blue Ridge Parkway
Sparta118.2190.2 NC 18 (Whitehead Street) – Laurel Springs
Twin Oaks121.1194.9 US 221 south – JeffersonSouth end of US 221 overlap
 124.3
0.0
200.0
0.0
North Carolina–Virginia state line
GraysonIndependence3.96.3 US 58 / US 221 north (Main Street) – Mouth of Wilson, GalaxNorth end of US 221 overlap
Elk Creek13.221.2Corners Rock Road
WytheSpeedwell21.234.1 SR 619 east / SR 749 west
Wytheville33.553.9 US 11 south (Lee Highway)South end of US 11 overlap
33.854.4 US 11 north (Main Street)North end of US 11 overlap
35.056.3 I-81 / US 52 – Bristol, Roanoke
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Bannered routes[edit]

Beaufort business loop[edit]


U.S. Route 21 Business
Location:Beaufort, South Carolina
Length:5.4 mi[7] (8.7 km)
Existed:1967–present

U.S. Route 21 Business (US 21 Bus) traverses through downtown Beaufort, via Sea Island Parkway, Carteret Street and Boundary Street.

Orangeburg business loop 1[edit]


U.S. Route 21 Business
Location:Orangeburg, South Carolina
Length:3.3 mi (5.3 km)
Existed:1950–1967

U.S. Route 21 Business (US 21 Bus) originally traversed along Broughton Street (in concurrency with US 178 Bus), Park Street, and Columbia Road. In 1967, the business loop was decommissioned after the establishment of the second business loop through Orangeburg; the old alignment continues as US 178 Bus (Broughton Street) and US 21 Conn (Park Street and Columbia Street).

Orangeburg business loop 2[edit]


U.S. Route 21 Business
Location:Orangeburg, South Carolina
Length:2.9 mi[8] (4.7 km)
Existed:1967–present


Orangeburg connector route[edit]


U.S. Route 21 Connector
Location:Orangeburg, South Carolina
Length:1.5 mi[9] (2.4 km)

U.S. Route 21 Connector (US 21 Conn) is an unsigned 1.5 miles (2.4 km) connector route from Broughton Street (US 178 Bus) to Chestnut Street (US 21/US 178), via Park Street and Columbia Road.[10]

Columbia connector route[edit]


U.S. Route 21 Connector
Location:Columbia, South Carolina


Columbia spur route[edit]


U.S. Route 21 Spur
Location:Columbia, South Carolina


Rock Hill business loop[edit]


U.S. Route 21 Business
Location:Rock Hill, South Carolina
Length:6.7 mi[11] (10.8 km)
Existed:1950–2013

U.S. Route 21 Business (US 21 Bus) originally traversed along Main Street, Albright Road, Black Street, Oakland Avenue, and Cherry Road, through downtown Rock Hill. It was decommissioned at the request of Rock Hill to gain ownership and maintenance oversight from the state.[12][13]

Fort Mill business loop[edit]


U.S. Route 21 Business
Location:Fort Mill, South Carolina
Length:7.1 mi[14] (11.4 km)
Existed:1948–present

U.S. Route 21 Business (US 21 Bus) traverses through downtown Fort Mill, via Spratt Street, White Street, Old Nations Road, and Springfield Parkway.

Elkin business loop[edit]


U.S. Route 21 Business
Location:Jonesville-Elkin, North Carolina
Length:7.8 mi[15] (12.6 km)
Existed:1966–present

U.S. Route 21 Business (US 21 Bus) traverses through downtown Jonesville and Elkin, via Main Street and Bridge Street. The route was established after the mainline was realigned east along a completed section of I-77.

See also[edit]

References[edit]

  1. ^ Droz, Robert V. (June 1, 2010). "North–South US Highways with Daughter Routes". US Highways from US 1 to US 830. Self-published. Retrieved June 2, 2012. [unreliable source]
  2. ^ a b Google Inc. "Overview Map of US 21 in SC". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=US-21+N%2FState+Rd+S-7-406&daddr=32.39446,-80.68124+to:32.92403,-80.85831+to:33.69169,-80.93173+to:33.85501,-81.022+to:33.91695,-81.07418+to:33.98799,-81.04643+to:34.11547,-80.98999+to:34.260892,-80.9616175+to:34.73667,-80.90525+to:34.9506,-80.99774+to:35.07296,-80.93542+to:I-77+N&hl=en&geocode=FdIX7gEduoY0-w%3BFdxM7gEd6OYw-ykb7RYx3gz8iDHGPNLiL0d0ew%3BFX5h9gEdOjMu-yl9JU6egE35iDErBacgoCGK4A%3BFSoYAgIdbhQt-ymPxxkX9874iDFmOgDlxE2boQ%3BFSKWBAId0LMr-yl5I2VMRLj4iDE87_PFx9RZ2w%3BFRaIBQId_Ocq-ylpTcIDVbn4iDHLXuBHIw96Fw%3BFZadBgIdYlQr-ykbW7gIPLv4iDFT6WiJmpR8YA%3BFY6PCAId2jAs-ynj73XeIKb4iDGG2D_eSO6WLw%3BFZzHCgIdr58s-ykfyx4lYQNWiDHg6jKVz1daxg%3BFR4KEgId3nst-ylf4OS4LnpWiDH2WzYgWfFZXQ%3BFchNFQIdlBIs-yn33j0yo4hWiDGaFIc2a4ywrg%3BFcArFwIdBAYt-ynnTKxxIptWiDF_kexPt6IOZA%3BFf6hFwIdDBct-w&mra=dpe&mrcr=0&mrsp=5&sz=12&via=1,2,3,4,5,6,7,8,9,10,11&sll=33.916013,-80.968895&sspn=0.212826,0.445976&ie=UTF8&ll=33.715202,-80.419922&spn=3.41286,7.13562&z=8. Retrieved February 1, 2011.
  3. ^ a b Google Inc. "Overview Map of US 21 in NC". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=I-77+N&daddr=35.33978,-80.84222+to:35.450738,-80.8669896+to:35.60639,-80.83859+to:35.736758,-80.8980744+to:35.7843879,-80.8854998+to:35.827681,-80.874724+to:35.93103,-80.78013+to:36.14551,-80.78297+to:US-21+N%2FUS-221+N&hl=en&geocode=Ff6hFwIdDBct-w%3BFQQ-GwIdFHIu-ynXhM_jD6dWiDHqjwYW4gPVWg%3BFXLvHAIdUxEu-ynDMEdtEKlWiDEqvqAdEJGcgA%3BFXZPHwIdQoAu-ymHyzxpCVVRiDFp7RYGin8CXg%3BFbZMIQId5pct-ymPSpwvU1dRiDGyPDp24QndKQ%3BFcMGIgIdBckt-ynxR4kCnVlRiDFb3Evqye4Vsw%3BFeGvIgIdHPMt-ymX5mAWNVlRiDEsQC3zyFANjQ%3BFZZDJAIdnmQv-ynxgYOuwN9TiDFIMvYY--0Oeg%3BFWaJJwIdhlkv-ykXsYEqQtZTiDHif8x5kl90UQ%3BFbgDLgId3rEp-w&mra=dpe&mrcr=0&mrsp=5&sz=15&via=1,2,3,4,5,6,7,8&sll=35.785931,-80.868173&sspn=0.026005,0.055747&ie=UTF8&ll=35.773258,-79.898071&spn=3.328915,7.13562&z=8. Retrieved February 1, 2011.
  4. ^ a b Google Inc. "Overview Maps of US 21 in VA". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=US-21+N%2FUS-221+N%2FNew+River+Pkwy&daddr=N+4th+St&hl=en&geocode=FbgDLgId3rEp-w%3BFY73MwIdA4gq-w&mra=dme&mrcr=0&mrsp=1&sz=16&sll=36.95946,-81.097255&sspn=0.012808,0.027874&ie=UTF8&ll=36.830172,-80.973358&spn=0.821096,1.783905&z=10. Retrieved February 1, 2011.
  5. ^ Sanderson, Dale (July 4, 2009). "End of US Highway 21". US Ends. Retrieved February 2, 2011.  Unknown parameter |published= ignored (help)[unreliable source]
  6. ^ Mapmikey; Prince, Adam (August 28, 2009). "US 21". NCRoads.com Annex: More Highways of North Carolina. Self-published. Archived from the original on June 16, 2011. Retrieved February 2, 2011. [unreliable source]
  7. ^ Google Inc. "US 21 Business - Beaufort". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=U.S.+21+Business&daddr=Boundary+St&hl=en&geocode=FdeY7gEdl18x-w%3BFXwB7wEdqIww-w&mra=me&mrcr=0&mrsp=1,0&sz=17&sll=32.440267,-80.703034&sspn=0.006764,0.013937&ie=UTF8&ll=32.428876,-80.679216&spn=0.054117,0.111494&z=14. Retrieved February 2, 2011.
  8. ^ Google Inc. "US 21 Business - Orangeburg 2". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=US-21+N%2FRowesville+Rd&daddr=Magnolia+St&hl=en&geocode=Ffq5_gEdslsu-w%3BFZJG_wEdoFMu-w&mra=me&mrcr=0&mrsp=1,0&sz=17&sll=33.506772,-80.847777&sspn=0.006683,0.013937&ie=UTF8&ll=33.493522,-80.849161&spn=0.053469,0.111494&z=14. Retrieved February 2, 2011.
  9. ^ Google Inc. "US 21 Connector - Orangeburg". Google Maps (Map). Cartography by Google, Inc. https://maps.google.com/maps?saddr=State+Rd+S-38-244&daddr=Columbia+Rd&hl=en&ll=33.506405,-80.85856&spn=0.030094,0.055747&sll=33.515937,-80.86549&sspn=0.003743,0.006968&geocode=Fcob_wEdnf8t-w%3BFWFq_wEd3RQu-w&mra=me&mrsp=1,0&sz=18&t=p&z=15. Retrieved July 8, 2013.
  10. ^ South Carolina Department of Transportation (July 11, 2012) (PDF). Functional Classification Map for City of Orangeburg (Map). http://dbw.scdot.org/GISMapping/pdfs/FunctionalClass/Orangeburg_City_FC.pdf. Retrieved July 8, 2013.
  11. ^ Google Inc. "US 21 Business - Rock Hill". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=S+Carolina+5+E%2FE+Main+St&daddr=34.9357292,-81.0270953+to:Cherry+Rd&hl=en&geocode=FVLJFAIdDy4s-w%3BFbETFQId6Z8r-yntv0-N_IhWiDFBY75CZQWBtA%3BFXeWFQIdviUs-w&mra=dpe&mrcr=0&mrsp=1&sz=14&via=1&sll=34.942096,-81.009064&sspn=0.052557,0.111494&ie=UTF8&ll=34.941111,-81.003914&spn=0.105116,0.222988&z=13. Retrieved February 2, 2011.
  12. ^ "Binder-all applications May 2013" (PDF). AASHTO. May 2013. p. 301. Retrieved July 7, 2013. 
  13. ^ "Report to SCOH from USRN SM2013 May 3" (PDF). AASHTO. May 3, 2013. p. 8. Retrieved July 7, 2013. 
  14. ^ Google Inc. "US 21 Businesss - Fort Mill". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=Unknown+road&daddr=35.0402778,-80.9285446+to:US-21+BUS+S%2FOld+Nation+Rd&hl=en&geocode=FfDsFQIdFX4s-w%3BFRWsFgId4CAt-ykFfzIbz4RWiDGsX7Qed84qUQ%3BFeAnFwIdXAYt-w&mra=dpe&mrcr=0&mrsp=1&sz=13&via=1&sll=35.03604,-80.887356&sspn=0.104994,0.222988&ie=UTF8&ll=35.033651,-80.940399&spn=0.104997,0.222988&z=13. Retrieved February 2, 2011.
  15. ^ Google Inc. "US 21 Business - Elkin". Google Maps (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=d&source=s_d&saddr=US-21+S%2FUS-21+BUS+S&daddr=36.253992,-80.8487545+to:US-21+S%2FUS-21+BUS+S%2FPoplar+Springs+Rd&hl=en&geocode=FRpSKAId6uwu-w%3BFSgxKQIdjlgu-ykDy23-g39RiDH4yzuihBn3fA%3BFUm7KQIdU04u-w&mra=dpe&mrcr=0&mrsp=1&sz=13&via=1&sll=36.247734,-80.825558&sspn=0.103414,0.222988&ie=UTF8&ll=36.262823,-80.768051&spn=0.206788,0.445976&z=12. Retrieved February 2, 2011.

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