U.S. Route 78 in South Carolina

U.S. Route 78 (US 78) is a 124.207-mile (199.892 km) U.S. highway that travels from Memphis, Tennessee to Charleston, South Carolina. In the U.S. state of South Carolina, it travels from the Savannah River at North Augusta to its eastern terminus in Charleston; connecting the cities of Aiken, Summerville, and North Charleston.

U.S. Highway 78
US 78 highlighted in red
Route information
Maintained by SCDOT
Length142.207 mi[1][2][3][4][5][6] (228.860 km)
Existed1927–present
Major junctions
West end US 1 / US 25 / US 78 / US 278 / SR 10 / SR 121 and SC 121 at the Georgia line near North Augusta
 
East endLine Street / King Street in Charleston
Location
CountiesAiken, Barnwell, Bamberg, Orangeburg, Dorchester, Charleston
Highway system
I-77 SC 79

Route description

US 78 enters South Carolina by crossing the Savannah River in North Augusta; sharing concurrences with US 1, US 25, US 278 and South Carolina Highway 121 (SC 121). In the immediate 2-mile (3.2 km) area, it sheds most concurrencies, sharing only with US 1 towards Aiken; it also connects with Interstate 520 (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.[7]

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 enters 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.[7]

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 and SC 781 to bypass Aiken), it is not a busy route because of the many cities and towns it goes through.[7]

History

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).[8][9]

Major intersections

CountyLocationmi[1][2][3][4][5][6]kmDestinationsNotes
AikenNorth Augusta0.000–
0.005
0.000–
0.0080
US 1 south / US 25 south / US 78 west / US 278 west / SR 10 west / SR 121 south (Gordon Highway) AugustaWestern end of SC 121; continuation from Georgia over the Savannah River; southern terminus of SC 121
0.188–
0.340
0.303–
0.547
5th Street Bridge / River North DriveInterchange
0.640–
0.710
1.030–
1.143
US 25 north / SC 121 north North Augusta, EdgefieldEastern end of US 25 and SC 121 concurrencies; interchange
0.8701.400East Buena Vista Avenue west (SC 125 Conn. north)[10]No access from Jefferson Davis Highway northbound to SC 125 Conn. or vice versa; southern terminus of SC 125 Conn.
1.560–
1.950
2.511–
3.138
I-520 (Palmetto Parkway) Augusta, Columbia, AtlantaI-520 exit 17
Clearwater2.150–
2.380
3.460–
3.830
US 278 east / SC 125 (Atomic Road) / SC 421 north (Augusta Road) Beech Island, Savannah River Site, ClearwaterEastern end of US 278 concurrency; southern terminus of SC 421; interchange
ClearwaterBurnettown line4.0406.502 SC 126 (Belvedere–Clearwater Road) Belvedere
Warrenville10.324–
10.330
16.615–
16.625
SC 191 (Main Street) Graniteville, Vaucluse, Warrenville
Aiken12.30019.795
US 1 Truck north / US 78 Truck east / SC 19 Truck to SC 118 (Robert M Bell Parkway / Hitchcock Parkway) / I-20 / SC 302
Southern terminus of US 1 Truck; western terminus of US 78 Truck; to USC Aiken
12.47020.069 SC 421 south (Augusta Road)Northern terminus of SC 421
15.62025.138 SC 19 (Laurens Street) Eureka, Edgefield
15.80025.428
SC 19 Conn. (Chesterfield Street) Savannah River Site
Signed also as SC 19
15.89025.572 US 1 north (York Street NE)Eastern end of US 1 concurrency
18.25029.371 SC 4 east (Wagener Road) to SC 302Western terminus of SC 4
18.45029.692
US 1 Truck north / US 78 Truck west / SC 4 Truck east / SC 118 south / SC 302 / I-20 (Pine Log Road SE)
Western end of SC 4 Truck concurrency; southern terminus of US 1 Truck; eastern terminus of US 78 Truck; northern terminus of SC 118
Windsor28.88046.478
SC 4 Truck east (State Park Road) Aiken State Park, State Park Boat Landing
Eastern end of SC 4 Truck concurrency
34.15754.970 SC 781 west (Tinker Creek Road)Eastern terminus of SC 781
BarnwellWilliston37.29760.024 SC 39 south (Rosemary Street / Dunbarton Road)Western end of SC 39 concurrency
37.55060.431 SC 39 north (Elko Street / Springfield Road) SpringfieldEastern end of SC 39 concurrency
Elko40.47065.130 SC 37 (Bay Street) Barnwell, Springfield
Blackville46.93075.527
US 78 Bus. east (Walker Street)
Signed western terminus of US 78 Bus.
47.01075.655 SC 3 (Solomon Blatt Avenue) Barnwell
47.09075.784 SC 304 south (Lartigue Street) HildaNorthern terminus of SC 304
47.54076.508
US 78 Bus. west (Main Street / US 78 Conn. west)
Eastern terminus of US 78 Bus./US 78 Conn.
BambergDenmark55.25088.916 US 321 / SC 70 (Palmetto Avenue) Orangeburg, Barnwell
Bamberg61.96099.715 US 301 / US 601 Orangeburg, Allendale, Ehrhardt
62.710100.922 SC 362 south Smoaks, WilliamsNorthern terminus of SC 362
71.980115.841 SC 61 south (Edisto River Road)Northern terminus of SC 61
72.170116.146 US 78 Conn. south to SC 61Northern terminus of US 78 Conn.
OrangeburgBranchville76.660123.372 US 21 south (Freedom Road) Smoaks, Walterboro, SavannahWestern end of US 21 concurrency
76.860123.694 US 21 north (Freedom Road) Orangeburg, ColumbiaEastern end of US 21 concurrency
DorchesterSt. George89.810–
89.830
144.535–
144.567
I-95 Savannah, FlorenceI-95 exit 77
91.830147.786 US 15 (Parler Avenue) Walterboro, Santee
105.470169.738 US 178 west (East Main Street) HarleyvilleEastern terminus of US 178
108.176174.092 SC 27 north (Ridgeville Road) Holly HillWestern end of SC 27 concurrency
108.664174.878 SC 27 south (Ridgeville Road) RidgevilleEastern end of SC 27 concurrency
110.114177.211School Street west (SC 173 west) / Myers–Mayo Road eastEastern terminus of SC 173 and School Street; western terminus of Myers–Mayo Road
Summerville119.124191.711
US 17 Alt. (North Main Street) Walterboro, Moncks Corner
119.404192.162 SC 165 (Berlin G. Myers Parkway / US 17 Alt. Truck) Ravenel
CharlestonDorchester county line
No major junctions
Dorchester
No major junctions
Charleston
No major junctions
CharlestonBerkeley county line
No major junctions
CharlestonNorth Charleston126.114–
126.139
202.961–
203.001
I-26 Columbia, CharlestonI-26 exit 205
127.534–
128.334
205.246–
206.534
US 52 west / N.A.D. Road east Goose Creek, Moncks CornerWestern end of US 52 concurrency; western terminus of N.A.D. Road; interchange
129.224207.966 US 52 Conn. south to I-26 east CharlestonNorthern terminus of US 52 Conn.; I-26 exit 209A; no access to I-26 west
133.844–
134.034
215.401–
215.707
I-526 (Mark Clark Expressway) Savannah, Mount PleasantI-526 exit 18
137.044220.551 SC 642 west (Dorchester Road)Eastern terminus of SC 642
137.194220.792 SC 7 south (Cosgrove Avenue)Northern terminus of SC 7
137.684221.581 US 52 east (Carner Avenue)Eastern end of US 52 concurrency
Charleston142.207228.860 Line Street to US 17 northNo access from US 78 (King Street) or Line Street eastbound to westbound Line Street; eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References

  1. "Highway Logmile Report". South Carolina Department of Transportation. Retrieved January 3, 2021.
  2. "Highway Logmile Report". South Carolina Department of Transportation. Retrieved January 3, 2021.
  3. "Highway Logmile Report". South Carolina Department of Transportation. Retrieved January 3, 2021.
  4. "Highway Logmile Report". South Carolina Department of Transportation. Retrieved January 3, 2021.
  5. "Highway Logmile Report". South Carolina Department of Transportation. Retrieved January 3, 2021.
  6. "Highway Logmile Report". South Carolina Department of Transportation. Retrieved January 3, 2021.
  7. Google (May 23, 2013). "Overview map of US 78 in South Carolina" (Map). Google Maps. Google. Retrieved May 23, 2013.
  8. General Highway Map, Barnwell County, South Carolina (PDF) (Map). Cartography by SCDOT. South Carolina Department of Transportation. 1967. Retrieved April 11, 2014.
  9. General Highway Map, Barnwell County, South Carolina (PDF) (Map). Cartography by SCDOT. South Carolina Department of Transportation. 1987. Retrieved April 11, 2014.
  10. Aiken & North Augusta Urban Area (PDF) (Map). South Carolina Department of Transportation. August 2019. p. Sheet 6. Retrieved September 12, 2020.
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U.S. Route 78
Previous state:
Georgia
South Carolina Next state:
Terminus
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