South Carolina Highway 421

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South Carolina Highway 421

Augusta Road
Route information
Maintained by SCDOT
Length10.360 mi[1] (16.673 km)
Major junctions
South end US 1 / US 78 / US 278 / SC 125 southwest of Clearwater
North end US 1 / US 78 in Aiken
CountryUnited States
StateSouth Carolina
Highway system
SC 420 SC 430

South Carolina Highway 421 (SC 421) is a 10.360-mile (16.673 km) state highway in the U.S. state of South Carolina. It is an alternate route to U.S. Route 1 (US 1) and US 78 between North Augusta and Aiken.

Route description

SC 421 begins where it splits off from US 1/US 78 (Jefferson Davis Highway) southwest of Clearwater; it immediately connects with US 278/SC 125 (Atomic Road). Heading northeast, it parallels US 1/US 78 to its south, going through the towns of Clearwater, Burnettown, Langley, Gloverville and Warrenville. Upon entering Aiken, it reconnects with US 1/US 78. A majority of the highway is four-lanes that travels a total of 10.4 miles (16.7 km).[2]


SC 421 was established by 1952 as a renumbering of US 1/US 78, which was realigned onto new four-lane routing just north of it. The route has remained unchanged since inception.[3][4]

Major intersections

The entire route is in Aiken County.


US 1 north / US 78 east (Jefferson Davis Highway) – Aiken
Northbound lane only; southern terminus
Clearwater0.2300.370 US 278 / SC 125 (Atomic Road) – North Augusta, Augusta, Beech Island, Savannah River SiteNorthern end of US 278 concurrency (northbound lane only); southbound lane exit onto interchange
SC 126 west (Belvedere-Clearwater Road) – Belvedere
Eastern terminus of SC 126
SC 191 north (Old Graniteville Highway) – Graniteville, Vaucluse
Southern terminus of SC 191
Aiken10.03016.142 SC 118 (Hitchcock Parkway / SC 19 Truck)
10.36016.673 US 1 / US 78 (Jefferson Davis Highway) – AikenNorthern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b "Highway Logmile Report". South Carolina Department of Transportation. Retrieved November 11, 2020.
  2. ^ South Carolina Highway 421 (Map). Cartography by Google. Google Maps. 2010.
  3. ^ General Highway Map, Aiken County, South Carolina (PDF) (Map). Cartography by SCDOT. South Carolina Department of Transportation. 1940. Retrieved September 8, 2013.
  4. ^ General Highway Map, Aiken County, South Carolina (PDF) (Map). Cartography by SCDOT. South Carolina Department of Transportation. 1956. Retrieved September 8, 2013.

External links