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U.S. Route 78 (US 78) is a U.S. highway that travels from Memphis, Tennessee to Charleston, South Carolina. In the U.S. state of South Carolina, it runs from the Savannah River at North Augusta to its eastern terminus in Charleston; connecting the cities of Aiken, Summerville, and North Charleston.

U.S. Route 78 marker

U.S. Route 78
Route of US 78 in South Carolina highlighted in red
Route information
Maintained by SCDOT
Length141.0 mi[1] (226.9 km)
Major junctions
West end US 1 / US 25 / US 78 / US 278 at the Georgia line near North Augusta
East endLine Street in Charleston
CountiesAiken, Barnwell, Bamberg, Orangeburg, Dorchester, Charleston
Highway system
SC 77SC 79


Route descriptionEdit

US 78 enters South Carolina by crossing the Savannah River in North Augusta; sharing concurrences with US 1, US 25, US 278 and SC 121. In the immediate 2-mile (3.2 km) area, it sheds most concurrences, sharing only with US 1 towards Aiken; it also connects with I-520, which is a partial beltway around the Augusta metropolitan area. In Aiken, it travels through the downtown area, where US 1 splits north towards Columbia. West of Williston is SC 781, which connects back with US 278; the routing allows travelers to bypass Aiken all together between Williston and Augusta.

Traveling in a southeasterly direction, it goes through the cities and towns of Williston, Blackville, Denmark, Bamberg, Branchville and St. George, where connects with I-95. Continuing east, it passes through Dorchester and begins to parallel with I-26 in a southeasterly direction through Summerville. It crosses into Charleston County at Lincolnville, where the highway skirts just inches south of the Berkeley County line. In North Charleston, US 78 shares a concurrency with US 52, as it connects with I-526. Entering Charleston, it splits with US 52 and goes south along King Street; its eastern terminus at Line Street, a block away from US 52's eastern/southern terminus and nearby to I-26/US 17 interchange.

US 78 is a predominantly two-lane rural highway connecting much of the Lowcountry. Wider sections (four-lanes or more) are found between North Augusta-Aiken, St. George and North Charleston. Though it provides the most direct route between Augusta and Charleston (using US 278/SC 781 to bypass Aiken), it is not a busy route because of the many cities and towns it goes through.


Established in 1927 as an original US highway, it traveled closely as it does today; from North Augusta to Charleston, connecting the cities and towns of Aiken, Bamberg, St. George, and North Charleston.

By 1931, US 78 was rerouted north of Summerville and Lincolnville, leaving Richardson Avenue/Lincoln Avenue. Around 1939, US 78 was realigned from Meeting Street to Rivers Street, south of Durant Avenue in the Charleston area. Also in 1939, US 78 was fully paved in the state, its last unpaved section was between St. George and US 178. By 1952, US 78 was placed on new four-lane highway bypassing Clearwater, Burnettown, and Gloverville; also by same year a new bridge was constructed over the Savannah River, leaving Fifth Street Bridge. By 1967, US 78 was adjusted to bypass south of mainstreet Blackville, leaving a secondary road, but was later upgraded as a connector (signed as a business loop).[2][3]

Major intersectionsEdit

AikenNorth Augusta0.00.0       US 1 south / US 25 south / US 78 west / US 278 west / SR 10 west / SR 121 south – AugustaContinuation from Georgia over the Savannah River
0.20.325th Street Bridge / River North DriveInterchange
0.71.1   US 25 north / SC 121 north – North Augusta, EdgefieldNorth end of US 25/SC 121 concurrency
1.42.3  I-520 (Palmetto Parkway) – Augusta, Columbia, AtlantaI-520 exit 17
Clearwater2.33.7    US 278 east / SC 125 (Atomic Road) / SC 421 north (Augusta Road) – Beech Island, Savannah River Site, ClearwaterEast end of US 278 concurrency; southern terminus of SC 421
Burnettown4.06.4  SC 126 (Belvedere–Clearwater Road) – Belvedere
Graniteville10.216.4  SC 191 (Main Street) – Graniteville, Vaucluse, Warrenville
Aiken12.219.6    SC 118 (Robert M Bell Parkway / Hitchcock Parkway) to I-20 / SC 302Southern terminus of US 1 Truck; western terminus of US 78 Truck; to USC Aiken
12.420.0  SC 421 south (Augusta Road)Northern terminus of SC 421
15.524.9  SC 19 (Laurens Street) – Eureka, Edgefield
  SC 19 Conn. (Chesterfield Street) – Savannah River Site
Signed also as SC 19
15.825.4  US 1 north (York Street NE)North end of US 1 concurrency
18.129.1   SC 4 east (Wagener Road) to SC 302Western terminus of SC 4
18.429.6    SC 118 / SC 302 (East Pine Log Road) to I-20Eastern terminus of US 78 Truck
34.255.0  SC 781 west (Tinker Creek Road)Eastern terminus of SC 781
BarnwellWilliston37.259.9  SC 39 south (Rosemary Street/Dunbarton Road)South end of SC 39 concurrency
37.560.4  SC 39 north (Elko Street/Springfield Road) – SpringfieldNorth end of SC 39 concurrency
Elko40.364.9  SC 37 (Bay Street) – Barnwell, Springfield
  US 78 Bus. east (Walker Street)
Western terminus of US 78 Bus.
46.875.3  SC 3 (Solomon Blatt Avenue) – Barnwell
46.975.5  SC 304 south (Lartigue Street) – HildaNorthern terminus of SC 304
  US 78 Bus. west (Main Street)
Eastern terminus of US 78 Bus.
BambergDenmark54.988.4   US 321 / SC 70 (Palmetto Avenue) – Orangeburg, Barnwell
Bamberg61.599.0   US 301 / US 601 – Orangeburg, Allendale, Ehrhardt
71.3114.7  SC 61 south (Edisto River Road)Northern terminus of SC 61
OrangeburgBranchville75.8122.0  US 21 south (Freedom Road) – Smoaks, Walterboro, SavannahSouth end of US 21 concurrency
76.0122.3  US 21 north (Freedom Road) – Orangeburg, ColumbiaNorth end of US 21 concurrency
DorchesterSt. George88.8142.9  I-95 – Savannah, FlorenceI-95 exit 77
90.9146.3  US 15 (Parler Avenue) – Walterboro, Santee
104.7168.5  US 178 west (East Main Street) – HarleyvilleEastern terminus of US 178
107.5173.0  SC 27 north (Ridgeville Road) – Holly HillWest end of SC 27 concurrency
107.9173.6  SC 27 south (Ridgeville Road) – RidgevilleEast end of SC 27 concurrency
  US 17 Alt. (North Main Street) – Walterboro, Moncks Corner
118.7191.0  SC 165 (Berlin G. Myers Parkway) – RavenelAlso carries US 17 Alt. Trk.
CharlestonNorth Charleston124.7200.7  I-26 – Columbia, CharlestonI-26 exit 205
126.8204.1  US 52 west – Goose Creek, Moncks CornerWest end of US 52 concurrency; interchange
128.2206.3  I-26 east – CharlestonI-26 exit 209A; no access to I-26 west
132.7213.6  I-526 (Mark Clark Expressway) – Savannah, Mount PleasantI-526 exit 18
135.7218.4  SC 642 west (Dorchester Road)Eastern terminus of SC 642
135.9218.7  SC 7 south (Cosgrove Avenue)Northern terminus of SC 7
136.4219.5  US 52 east (Carner Avenue)East end of US 52 concurrency
Charleston141.0226.9Line StreetEastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See alsoEdit


  1. ^ a b Google (May 23, 2013). "Route of US 78 in South Carolina" (Map). Google Maps. Google. Retrieved May 23, 2013.
  2. ^ General Highway Map, Barnwell County, South Carolina (PDF) (Map). Cartography by SCDOT. South Carolina Department of Transportation. 1967. Retrieved April 11, 2014.
  3. ^ General Highway Map, Barnwell County, South Carolina (PDF) (Map). Cartography by SCDOT. South Carolina Department of Transportation. 1987. Retrieved April 11, 2014.

External linksEdit