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{{short description|Highway in North and South Carolina}}
{{Infobox road
|country=USA
|type=US
|route=521
|map={{maplink-road|from=U.S. Route 521.map}}
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=290|frame-lat=34.214|frame-long=-80.081|zoom=7|type=line|raw={{Wikipedia:Map data/Wikipedia KML/U.S. Route 521}}}}
|map_custom=yes
|map_notes=US 521 highlighted in red
|length_mi=177.3
|length_ref=<ref name=google>{{google maps |url = https://maps.google.com/maps?f=d&source=s_d&saddr=Highmarket+St&daddr=33.4418741,-79.5842562+to:33.699999,-80.2089717+to:33.704313,-80.2087611+to:Johnston+Rd&hl=en&geocode=Fcg9_QEd3iZG-w%3BFVJI_gEdAKRB-ynzeAlm3s3_iDHpZq8NR6Jkqg%3BFZ84AgIdtRs4-ynL5v5iagz_iDFzY8kBdaii9A%3BFXlJAgIdhxw4-yn5jLzGaQz_iDEJ0Ox15d1ljQ%3BFaISFwIdxGcu-w&mra=dpe&mrcr=0&mrsp=1&sz=14&via=1,2,3&sll=33.438819,-79.563246&sspn=0.053503,0.111494&ie=UTF8&ll=34.563121,-80.093079&spn=1.689521,3.56781&z=9 |title =US Overview Map of US&nbsp;521 |accessdateaccess-date = January 31, 2011 }}</ref>
|established=1932
|direction_a=South
|terminus_a={{Jct|state=SC|US|17}} in [[Georgetown, South Carolina|Georgetown, SC]]
|junction={{plainlist|
*{{Jct|state=SC|US-Alt|17}} in Georgetown, SC
*{{Jct|state=SC|I|95}} near [[Manning, South Carolina|Manning, SC]]
Line 18 ⟶ 19:
*{{Jct|state=SC|I|20}} in [[Camden, South Carolina|Camden, SC]]
*{{Jct|state=SC|US|1|US|601|SC|34}} in Camden, SC
}}
|direction_b=North
|terminus_b={{Jct|state=NC|I|485}} in [[Charlotte, North Carolina|Charlotte, NC]]
|states=[[South Carolina]], [[North Carolina]]
|counties='''SC:''' [[Georgetown County, South Carolina|Georgetown]], [[Williamsburg County, South Carolina|Williamsburg]], [[Clarendon County, South Carolina|Clarendon]], [[Sumter County, South Carolina|Sumter]], [[Kershaw County, South Carolina|Kershaw]], [[Lancaster County, South Carolina|Lancaster]]<br />'''NC:''' [[Mecklenburg County, North Carolina|Mecklenburg]]
|system={{infobox road/browselinks/USA|type=US}}{{infobox road/browselinks/USA|state=SC}}{{infobox road/browselinks/USA|state=NC}}
|browse={{sc browse|previous_type=I|previous_route=520|route=[[List of numbered highways in South Carolina|SC]]|next_type=SC|next_route=522}}<br />{{nc browse|previous_type=US|previous_route=501|route=[[North Carolina State Highways|NC]]|next_type=NC|next_route=522}}
|spur_of=21
|spur_type=US
}}
[[File:US 521 in Indian Land.jpg|thumb|U.S. Route US&nbsp;521 in [[Indian Land, South Carolina]]]]
'''U.S. Route&nbsp;521''' ('''US&nbsp;521''') is a north&ndash;south [[United States highwayHighway]] that traverses {{convert|177.3|mi}}, from [[Georgetown, South Carolina|Georgetown]], [[South Carolina]] to [[Charlotte, North Carolina|Charlotte]], [[North Carolina]]. Though numbered as aan daughterauxiliary route of [[U.S. Route 21|US&nbsp;21]], it does not actually intersect its parent ''or'' any of its sibling routes, though it is in the same general part of the U.S.country as other routes from its family. Historically, it once connected to U.S. US&nbsp;21 in [[Pineville, North Carolina]], but various changes have left it terminating a few miles short of the current U.S. US&nbsp;21.
 
==Route description==
===South Carolina===
Starting at the city of [[Georgetown, South Carolina|Georgetown]], US&nbsp;521 runs through the town [[Andrews, South Carolina|Andrews]] to [[Greeleyville, South Carolina|Greeleyville]]. From here to the city of [[Manning, South Carolina|Manning]] it is known as the Greeleyville Highway. There is a brief section right before Manning where it runs concurrent with [[South Carolina Highway 261|SC&nbsp;261]]. In Manning SC&nbsp;261 branches off and US 521 merges with [[U.S. Route 301 in South Carolina|US&nbsp;301]] for a short distance. It crosses over [[Interstate 95 in South Carolina|I-Interstate&nbsp;95]] (I-95) and heads to the city of [[Sumter, South Carolina|Sumter]]. In Sumter, it runs together with [[U.S. Route 378|US&nbsp;Business 378]]. Leaving Sumter, US&nbsp;521 is known as Camden Highway. It passes under [[Interstate 20 in South Carolina|I-20]] and proceeds to [[Camden, South Carolina|Camden]]. It then goes on to the town of [[Kershaw, South Carolina|Kershaw]], running concurrent with [[U.S. Route 601|US&nbsp;601]]. The final city it goes through before going into North Carolina is [[Lancaster, South Carolina|Lancaster]].
 
===North Carolina===
US&nbsp;521 traverses {{convert|3.8|mi|km}} from the [[South Carolina]] state line to [[Interstate 485 (North Carolina)|Interstate I-485]]. The entire route is a four- to six-lane divided highway, split in naming between Lancaster Highway and Johnston Road.
 
==History==
Established in 1932, it was overlapped entirely with SC &nbsp;26, from [[Georgetown, South Carolina|Georgetown]] to the [[North Carolina]] state line, where it continued with [[North Carolina Highway 26|NC&nbsp;26]] into [[Pineville, North Carolina|Pineville]], where it ended at [[U.S. Route&nbsp;21]]/[[North Carolina Highway 261|NC&nbsp;261]] (now [[North Carolina Highway 51|NC&nbsp;51]]). In 1933, SC&nbsp;26 was decommissioned; followed in 1934 with the decommissioning of [[North Carolina Highway 26|NC&nbsp;26]].
 
In 1949, US&nbsp;521 was rerouted in [[Williamsburg County, South Carolina|Williamsburg County]] to run directly from [[Andrews, South Carolina|Andrews]], through [[Salters, South Carolina|Salters]] and [[Greeleyville, South Carolina|Greeleyville]], to [[Manning, South Carolina|Manning]]; which replaced [[South Carolina Highway 171|SC&nbsp;171]] and part of [[South Carolina Highway 261|SC&nbsp;261]], the old alignment became part of [[South Carolina Highway 377|SC&nbsp;377]] and [[South Carolina Highway 261|SC&nbsp;261]]. Between 1962 and 1964, US&nbsp;521 was rerouted at the [[Sumter County, South Carolina|Sumter]]-[[Kershaw County, South Carolina|Kershaw]] county line to [[Camden, South Carolina|Camden]]; the old alignment became an extension of [[South Carolina Highway 261|SC&nbsp;261]].
 
In 1969, US&nbsp;521 was extended {{convert|19|mi|km}} north, via South Boulevard, and Wilkinson Blvd, then in 1981, by way of Woodlawn Road, and Billy Graham Parkway, to [[Interstate 85 in North Carolina|I-85]] in [[Charlotte, North Carolina|Charlotte]].
In 1949, US&nbsp;521 was rerouted in [[Williamsburg County, South Carolina|Williamsburg County]] to run directly from [[Andrews, South Carolina|Andrews]], through [[Salters, South Carolina|Salters]] and [[Greeleyville, South Carolina|Greeleyville]], to [[Manning, South Carolina|Manning]]; which replaced [[South Carolina Highway 171|SC 171]] and part of [[South Carolina Highway 261|SC 261]], the old alignment became part of [[South Carolina Highway 377|SC 377]] and [[South Carolina Highway 261|SC 261]]. Between 1962-64, US&nbsp;521 was rerouted at the [[Sumter County, South Carolina|Sumter]]-[[Kershaw County, South Carolina|Kershaw]] county line to [[Camden, South Carolina|Camden]]; the old alignment became an extension of [[South Carolina Highway 261|SC 261]].
 
Between 1986 and 1988, US&nbsp;521 was moved west onto new highway west of [[Dalzell, South Carolina|Dalzell]], bypassing the town; the old alignment was downgraded to secondary roads.
In 1969, US&nbsp;521 was extended {{convert|19|mi|km}} north, via South Boulevard, and Wilkinson Blvd, then in 1981, by way of Woodlawn Road, and Billy Graham Parkway, to [[Interstate 85 in North Carolina|Interstate 85]] in [[Charlotte, North Carolina|Charlotte]].
 
In 1996, US&nbsp;521 was rerouted onto [[Interstate 485 (North Carolina)|I-485]], between exits 61 and 65; the old alignment was downgraded to secondary roads. In 2003, the [[American Association of State Highway and Transportation Officials]] (AASHTO) approved US&nbsp;521 to be truncated at its current northern terminus at the Johnston Road/I-485 interchange; its old alignment north to I-85 was downgraded to secondary roads.<ref>{{cite web |publisher= North Carolina Department of Transportation |url= https://connect.ncdot.gov/resources/safety/Route%20Changes/Route%20Changes/US521_20030915.pdf |title= US 521 Route Change (2003-09-15)|date= September 15, 2003 |access-date= January 27, 2013}}</ref><ref name=Mapmikey>{{cite web |url=https://www.angelfire.com/sc3/scroads/us521.html|title=Mapmikey's South Carolina Highways Page: US 521|access-date=January 15, 2012}}{{sps|certain=yes|date=May 2022}}</ref><ref>{{cite web |url=http://www.vahighways.com/ncannex/route-log/us521.html|title=NCRoads.com: U.S. 521|access-date=January 15, 2012}}{{sps|certain=yes|date=May 2022}}</ref>
Between 1986-88, US&nbsp;521 was moved west onto new highway west of [[Dalzell, South Carolina|Dalzell]], bypassing the town; the old alignment was downgraded to secondary roads.
 
[[File:History of U.S. Route 521 in North Carolina.png|thumb|A map showing the history of U.S. Route 521 in North Carolina, with the various alignments it has had over time.|452x452px]]
In 1996, US&nbsp;521 was rerouted onto [[Interstate 485 (North Carolina)|Interstate 485]], between exits 61 and 65; the old alignment was downgraded to secondary roads. In 2003, [[American Association of State Highway and Transportation Officials|AASHTO]] approved US&nbsp;521 to be truncated at its current northern terminus at the Johnston Road/[[Interstate 485 (North Carolina)|Interstate 485]] interchange; its old alignment north to [[Interstate 85 in North Carolina|Interstate 85]] was downgraded to secondary roads.<ref>{{cite web |publisher= North Carolina Department of Transportation |url= https://connect.ncdot.gov/resources/safety/Route%20Changes/Route%20Changes/US521_20030915.pdf |format= PDF |title= US 521 Route Change (2003-09-15)|date= September 15, 2003 |accessdate= January 27, 2013}}</ref><ref name=Mapmikey>{{cite web |url=http://www.angelfire.com/sc3/scroads/us521.html|title=Mapmikey's South Carolina Highways Page: US 521|accessdate=January 15, 2012}}</ref><ref>{{cite web |url=http://www.vahighways.com/ncannex/route-log/us521.html|title=NCRoads.com: U.S. 521|accessdate=January 15, 2012}}</ref>
 
==Future==
There are plans to make US&nbsp;521 a four-lane highway from [[Georgetown, South Carolina|Georgetown]] to [[Interstate 95 in South Carolina|Interstate I-95]], in [[Manning, South Carolina|Manning]]. This would improve{{according to whom?|date=February 2022}} a route for beach goers traveling toward the Litchfield/Pawleys area.
 
==Junction list==
{{jcttop|exit|state_col=state|length_ref=<ref name="google"/>}}
{{SCint|exit
|sspan=4043
|county=Georgetown
|cspan=6
Line 61 ⟶ 64:
|mile=0.0
|road={{jct|state=SC|US|17|name1=Fraser Street|city1=Charleston|city2=Myrtle Beach}}
|notes=Southern terminus of US&nbsp;521
}}
{{SCint|exit
|type=concur
|mile=0.1
|road={{jct|state=SC|US-Alt|17|name1=Exchange Street|city1=Pawleys Island|city2=Myrtle Beach}}
|notes=NorthSouthern end of US&nbsp;17 Alt. overlapconcurrency
}}
{{SCint|exit
|location=Sampit
Line 72 ⟶ 77:
|mile=9.5
|road={{jct|state=SC|US-Alt|17|name1=Saints Delight Road|city1=Jamestown|city2=Moncks Corner}}
|notes=SouthNorthern end of US&nbsp;17 Alt. overlapconcurrency
}}
{{SCint|exit
|location=none
|mile=16.0
|road={{jct|state=SC|US-Bus|521|dab1=Andrews|city1=Andrews}}
|notes=}}
{{SCint|exit
|location=none
|mile=18.5
|road={{jct|state=SC|SC-Bus|41|dab1=Andrews|to1=to|city1=Andrews}}
}}
{{SCint|exit
|location=none
Line 87 ⟶ 94:
|mile=19.5
|road={{jct|state=SC|SC|41|name1=County Line Road|city1=Jamestown|city2=Charleston}}
|notes=SouthSouthern end of SC&nbsp;41 overlap}}concurrency
}}
{{SCint|exit
|county=Williamsburg
Line 95 ⟶ 103:
|mile=21.0
|road={{jct|state=SC|US-Bus|521|SC|41|dab1=Andrews|name2=County Line Road|city1=Hemingway}}
|notes=NorthNorthern end of SC&nbsp;41 overlap}}concurrency
}}
{{SCint|exit
|location=none
|mile=38.0
|road={{jct|state=SC|SC|377|name1=Martin Luther King Jr. Avenue|city1=Lane|city2=Kingstree}}
|notes=}}
{{SCint|exit
|location=none
|mile=45.5
|road={{jct|state=SC|US|52|name1=Williamsburg County Highway|city1=Charleston|city2=Kingstree}}
}}
{{SCint|exit
|location=Greeleyville
|mile=48.5
|road={{jct|state=SC|SC|375|dir1=south|name1=Gourdin Road|city1=St. Stephen|city2=Charleston}}}}
|notes=Northern terminus of SC&nbsp;375
}}
{{SCint|exit
|county=Clarendon
|cspan=56
|location=none
|type=concur
|mile=60.5
|road={{jct|state=SC|SC|261|dir1=east|name1=Kingstree Highway|city1=Kingstree}}
|notes=EastSouthern end of SC&nbsp;261 overlap}}concurrency
}}
{{SCint|exit
|location=Manning
Line 123 ⟶ 136:
|mile=63.5
|road={{jct|state=SC|SC|261|dir1=west|name1=Boyce Street}}
|notes=WestNorthern end of SC&nbsp;261 overlap}}concurrency
}}
{{SCint|exit
|type=concur
|mile=64.0
|road={{jct|state=SC|US|301|dir1=south|name1=Brooks Street}}
|notes=SouthSouthern end of US&nbsp;301 overlap}}concurrency
}}
{{SCint|exit
|location=none
Line 134 ⟶ 149:
|mile=65.5
|road={{jct|state=SC|US|301|dir1=north|city1=Turbeville}}
|notes=NorthNorthern end of US&nbsp;301 overlap}}concurrency
}}
{{SCint|exit
|location=none
|mile=67.0
|road={{jct|state=SC|I|95|road|Main Street|dir2=north|name2=[[U.S. Route 301 Connector (Alcolu 1, South Carolina)|US&nbsp;301 Conn.]] north|city1=Florence|location2=[[Savannah, Georgia|Savannah]]}}}}
|notes=I-95 exit 122; southern terminus of US&nbsp;301 Conn. and Main Street
}}
{{SCint|exit
|location=Alcolu
|county=Sumter
|cspanmile=8
|road={{jct|state=SC|road|Main Street|dir1=south|name1=[[U.S. Route 301 Connector (Alcolu 2, South Carolina)|US&nbsp;301 Conn.]] south}}
|location=Sumter
|notes=Northern terminus of US&nbsp;301 Conn. and Main Street
|lspan=7
}}
|mile=79.0
|road={{jct|state=SC|US-Conn|521|dab1=Sumter|to1=to|name1=Guignard Parkway}}}}
{{SCint|exit
|county=Sumter
|type=concur
|cspan=7
|location1=Sumter
|location2=South Sumter
|lspan=2
|mile=80.5
|road={{jct|state=SC|US|15|dir1=south|name1=Pocalla Road|city1=Summerton|city2=Bishopville}}
}}
|notes=South end of US&nbsp;15 overlap}}
{{SCint|exit
|mile=
|road={{jct|state=SC|US-Conn|15|dab1=Sumter|dir1=south|noshield1=y|to2=y|US|15|dir2=south}}
|notes=Northern terminus of US&nbsp;15 Conn.
}}
{{SCint|exit
|location=Sumter
|lspan=4
|mile=82.3
|road={{jct|state=SC|US|76|SC|763|name1=West Liberty Street}}|location1=Genealogical and Historical Research Center|location2=Sumter County Museum|extra=hospital}}
}}
{{SCint|exit
|type=concur
|mile=82.6
|road={{jct|state=SC|US|15|US|401|dir1=north|dir2=north|name1=Lafayette Street|name2=Calhoun Street}}
|notes=North end of US&nbsp;15 and US&nbsp;401 overlap}}
{{SCint|exit
|type=concur
|mile=83.0
|road={{jct|state=SC|US-Bus|76|US|401|dab1=Sumter|dir1=north|dir2=northeast|name1=WashingtonBroad Street|name2road|Bultman Drive north|city1=Calhoun StreetSumter}}
|notes=EastSouthern end of US&nbsp;76 Bus. overlap,concurrency; southBultman endDrive andcontinues terminus of US&nbsp;401past overlap}}intersection
}}
{{SCint|exit
|mile=85.0
|road={{jct|state=SC|US-Conn|15|US-Conn|521|dab1=Sumter|dab2=Sumter|dir1=south|dir2=south|name2=Bultman Drive}}
|notes=}}
{{SCint|exit
|type=concur
|mile=86.0
|road={{jct|state=SC|US|76|US-Bus|76|USdab1=Sumter|378dir1=west|dab2name1=SumterBroad Street|city1location1=Columbia[[Shaw Air Force Base]]|city2=TurbevilleColumbia}}
|notes=WestNorthern end of US&nbsp;76 Bus. overlapconcurrency
}}
{{SCint|exit
|type=incomplete
|mile=
|road={{jct|state=SC|road|South Pike West|dir1=east|to2=y|US|76|dir2=east|US|378|dir3=east|city1=Conway}}
|notes=No access from US&nbsp;521 to westbound US&nbsp;76/US&nbsp;378 or from eastbound US&nbsp;76/US&nbsp;378 to US&nbsp;521
}}
{{SCint|exit
|location=Dalzell
|mile=93.5
|road={{jct|state=SC|SC|441|name1=Peach Orchard Road|city1=Bishopville|location2=[[Shaw Air Force Base]] }}
}}
{{SCint|exit
|county=Kershaw
|cspan=47
|location=none
|mile=107.0
|road={{jct|state=SC|SC|261|name1=Boykin Road}}
}}
{{SCint|exit
|location=Camden
|lspan=36
|mile=110.0
|road={{jct|state=SC|I|20|city1=Columbia|city2=Florence}}}}
|notes=I-20 exit 98
}}
{{SCint|exit
|mile=
|type=concur
|road={{jct|state=SC|US-Truck|521|dab1=Camden 1|dir1=north|name1=Ehrenclou Drive|US-Truck|1|dab2=Camden|dir2=begins|location1=[[Camden High School (Camden, South Carolina)|Camden High School]]}}
|notes=Southern end of US&nbsp;1 Truck concurrency; southern terminus of US&nbsp;1 Truck and US&nbsp;521 Truck
}}
{{SCint|exit
|mile=
|type=concur
|road={{jct|state=SC|US-Truck|1|dab1=Camden|dir1=north|SC-Truck|34|dab2=Camden|dir2=north|name2=York Street / [[U.S. Route 521 Truck (Camden 2, South Carolina)|US&nbsp;521 Truck]] north|location1=[[Camden High School (Camden, South Carolina)|Camden High School]]|location2=Alpha Center}}
|notes=Northern end of US&nbsp;1 Truck concurrency; southern terminus of US&nbsp;521 Truck and SC&nbsp;34 Truck
}}
{{SCint|exit
|type=concur
|mile=111.0
|road={{jct|state=SC|US|1|US|601|dir2=south|SC|34|name3=Dekalb Street|city1=Columbia|city2=Cheraw|city3=Bishopville}}
|notes=SouthSouthern end of US&nbsp;601 overlap}}concurrency
}}
{{SCint|exit
|mile=
|road={{jct|state=SC|US-Truck|521|dab1=Camden 1|dir1=south|US-Truck|601|dab2=Camden|dir2=south|name2=Boykin Road|road|Cool Springs Drive east|location1=Springdale Race Course|location2=Steeplechase Museum|location3=Camden Country Club}}
|notes=Northern terminus of US&nbsp;521 Truck, US&nbsp;601 Truck, and Boykin Road; western terminus of Cool Springs Drive
}}
{{SCint|exit
|mile=113.0
|road={{jct|state=SC|SC|97|dir1=north|name1=Liberty Hill Road|city1=Great Falls}}}}
|notes=Southern terminus of SC&nbsp;97
}}
{{SCint|exit
|county=Lancaster
Line 202 ⟶ 254:
|lspan=2
|mile=133.0
|road={{jct|state=SC|SC|341|dir1=south|name1=Marion Street|city1=Bethune}}}}
|notes=Northern terminus of SC&nbsp;341 north
}}
{{SCint|exit
|type=concur
|mile=133.3
|road={{jct|state=SC|US|601|dir1=north|name1=Hilton Street|city1=Pageland}}
|notes=NorthNorthern end of US&nbsp;601 overlap}}concurrency
}}
{{SCint|exit
|location=Heath Springs
|mile=139.0
|road={{jct|state=SC|SC|522|dir1=south|name1=Caston Street|city1=Liberty Hill}}}}
|notes=
}}
{{SCint|exit
|location=Pleasant Hill
|mile=142.0
|road={{jct|state=SC|SC|522|dir1=north|name1=Rocky River Road}}
}}
{{SCint|exit
|location=Lancasternone
|lspan=5
|mile=148.0
|road={{jct|state=SC|US-Bus|521|dab1=Lancaster|dir1=north|name1=Kershaw Camden Highway}}}}
|notes=Southern terminus of US&nbsp;521 Bus.
}}
{{SCint|exit
|location=Lancaster
|mile=149.0
|road={{jct|state=SC|SC|903|name1=Flat Creek Road|city1=Lancaster|city2=McBee|city3=Hartsville|city4=Myrtle Beach}}
|notes=Interchange
}}
{{SCint|exit
|location=none
|mile=150.0
|type=concur
|road={{jct|state=SC|SC|9|dir1=south|name1=Pageland Highway|SC-Bus|9|dir2=north|dab2=Lancaster|name2=Arch Street|city1=Pageland|city2=Lancaster}}
|notes=Interchange; southSouthern end of SC&nbsp;9 overlap}}concurrency; interchange
}}
{{SCint|exit
|location=Lancaster
|lspan=2
|mile=152.0
|road={{jct|state=SC|SC|200|name1=Monroe Road|city1=Lancaster|location2=[[Monroe, North Carolina|Monroe]]}}
|notes=Interchange
}}
{{SCint|exit
|mile=152.5
|type=concur
|road={{jct|state=SC|US-Bus|521|dab1=Lancaster|dir1=south|name1=Main Street}}<br>{{jct|state=SC|SC|9|dir1dir2=north|city1=Chester}}
|notes=Interchange; northNorthern end of SC&nbsp;9 overlap}}concurrency; northern terminus of US&nbsp;521 Bus.; interchange
}}
{{SCint|exit
|location=none
|mile=159.0
|type=concur
|road={{jct|state=SC|SC|5|dir1=north|name1=Rock Hill Highway|city1=Rock Hill}}}}
|road={{jct|state=SC|SC|5|dir1=north|SC-Truck|75|dab2=Van Wyck|dir2=south|name2=Rock Hill Highway|city1=Rock Hill}}
|notes=Southern end of SC&nbsp;75 Truck concurrency; southern terminus of SC&nbsp;5
}}
{{SCint|exit
|location=none
Line 248 ⟶ 318:
|mile=161.5
|road={{jct|state=SC|SC|75|dir1=south|name1=Rebound Road}}
|notes=Northern end of [[South Carolina Highway 75 Truck (Van Wyck)|SC&nbsp;75 Truck]] concurrency; southern end of SC&nbsp;75 overlap}}concurrency
}}
{{SCint|exit
|location=none
Line 254 ⟶ 325:
|mile=165.0
|road={{jct|state=SC|SC|75|dir1=north|name1=Waxhaw Highway|location1=[[Waxhaw, North Carolina|Waxhaw]]}}
|notes=NorthNorthern end of SC&nbsp;75 overlap}}concurrency
}}
{{SCint|exit
|location=Indian Land
|mile=172.0
|road={{jct|state=SC|SC|160|dir1=north|name1=Fort Mill Highway|city1=Fort Mill}}}}
|notes=Southern terminus of SC&nbsp;160
}}
{{jctplace|exit
|river_wide=yes
Line 265 ⟶ 339:
|mile2=0.0
|line=yes
|place=South Carolina–North Carolina state line
}}
{{NCint|exit
|sspan=2
Line 273 ⟶ 348:
|lspan=2
|mile=1.0
|road={{jct|state=NC|road|Lancaster Highway&nbsp;– [[Pineville, North Carolina|city1=Pineville]]}}
}}
{{NCint|exit
|mile=3.8
|road={{jct|state=NC|I|485|city1=Matthews|city2=Pineville}}
|notes=Northern terminus of US&nbsp;521
}}
{{Jctbtm|col=8|keys=concur}}
 
==Special routes==
{{main|Special routes of U.S. Route 521}}
 
==See also==
*{{Portal-inline|U.S. roads}}
 
==References==
{{reflist|30em}}
 
==External links==
{{Attached KML}}
*{{commons category-inline|U.S. Route 521}}
*[http://usends.com/521.html Endpoints of US &nbsp;521]
 
{{US 21}}
 
[[Category:United States Numbered HighwaysHighway System|21-5]]
[[Category:U.S. Highways in South Carolina|21-5]]
[[Category:U.S. Highways in North Carolina|21-5]]