 U.S. Highway 78 | ||||
|---|---|---|---|---|
 US 78 highlighted in red | ||||
| Route information | ||||
| Maintained bySCDOT | ||||
| Length | 142.207 mi[1][2][3][4][5][6] (228.860 km) | |||
| Existed | 1927[citation needed]–present | |||
| Major junctions | ||||
| West end |       US 1 /US 25 /US 78 /US 278 /SR 10 /SR 121 at theGeorgia line nearNorth Augusta | |||
| Major intersections | ||||
| East end | Line Street / King Street in Charleston | |||
| Location | ||||
| Country | United States | |||
| State | South Carolina | |||
| Counties | Aiken,Barnwell,Bamberg,Orangeburg,Dorchester,Charleston | |||
| Highway system | ||||
| ||||
U.S. Route 78 (US 78) is a 142.207-mile (228.860 km)U.S. highway that travels fromSwifton, Arkansas toCharleston, South Carolina. In theU.S. state ofSouth Carolina, it travels from theSavannah River atNorth Augusta to its eastern terminus in Charleston; connecting the cities ofAiken,Summerville, andNorth Charleston.
US 78 enters South Carolina by crossing theSavannah River inNorth Augusta; sharingconcurrences withUS 1,US 25,US 278 andSouth Carolina Highway 121 (SC 121). In the immediate 2-mile (3.2 km) area, it sheds most concurrencies, sharing only with US 1 towardsAiken; it also connects withInterstate 520 (I-520), which is a partial beltway around theAugusta metropolitan area. In Aiken, it travels through the downtown area, where US 1 splits north towardsColumbia. West ofWilliston isSC 781, which connects back with US 278; the routing allows travelers to bypass Aiken all together between Williston andAugusta.[7]
Traveling in a southeasterly direction, it goes through the cities and towns of Williston,Blackville,Denmark,Bamberg,Branchville andSt. George, where connects withI-95. Continuing east, it passes throughDorchester and begins to parallel withI-26 in a southeasterly direction throughSummerville. It entersCharleston County atLincolnville, where the highway skirts just inches south of theBerkeley County line. InNorth Charleston, US 78 shares a concurrency withUS 52, as it connects withI-526. EnteringCharleston, 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 theLowcountry. 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 points west, such asAtlanta) 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]
Established in 1927 as an original US highway, it traveled closely as it does today; fromNorth Augusta toCharleston, connecting the cities and towns ofAiken,Bamberg,St. George, andNorth Charleston.
By 1931, US 78 was rerouted north ofSummerville andLincolnville, 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 andUS 178. By 1952, US 78 was placed on new four-lane highway bypassingClearwater,Burnettown, andGloverville; also by same year a new bridge was constructed over theSavannah River, leaving Fifth Street Bridge. By 1967, US 78 was adjusted to bypass south of mainstreetBlackville, leaving a secondary road, but was later upgraded as a connector (signed as a business loop).[8][9]
| County | Location | mi[1][2][3] [4][5][6] | km | Destinations | Notes |
|---|---|---|---|---|---|
| Savannah River | 0.000 | 0.000 |   US 1 south /US 25 south /SR 121 south /US 78 west /US 278 west /SR 10 west (Gordon Highway) –Augusta | Continuation intoGeorgia | |
| 0.000– 0.005 | 0.000– 0.0080 | South Carolina–Georgia state line | |||
| Aiken | North Augusta | 0.188– 0.340 | 0.303– 0.547 | 5th Street Bridge / River North Drive | Interchange |
| 0.640– 0.710 | 1.030– 1.143 |   US 25 /SC 121 north –North Augusta,Edgefield | East end of freeway section; eastern end of US 25 and SC 121 concurrencies | ||
| 0.870 | 1.400 |     Buena Vista Avenue (SC 125 Conn. west) toI-20 /SC 230 | Right-in/right-out interchange; westbound exit and entrance; eastern terminus of SC 125 Conn.[10] | ||
| 1.560– 1.950 | 2.511– 3.138 |  I-520 (Palmetto Parkway) –Augusta,Columbia,Atlanta | I-520 exit 17 | ||
| Clearwater | 2.150– 2.380 | 3.460– 3.830 |   US 278 east /SC 125 (Atomic Road) –Beech Island,Savannah River Site SC 421 north (Augusta Road) –Clearwater | Interchange; eastern end of US 278 concurrency; southern terminus of SC 421 | |
| Clearwater–Burnettown line | 4.040 | 6.502 |  SC 126 (Belvedere–Clearwater Road) –Belvedere | ||
| Warrenville | 10.324– 10.330 | 16.615– 16.625 |  SC 191 (Main Street) –Graniteville,Vaucluse,Warrenville | ||
| Aiken | 12.300 | 19.795 |       US 1 Truck north /US 78 Truck east /SC 19 Truck /SC 118 (Robert M Bell Parkway / Hitchcock Parkway) toI-20 /SC 302 | Southern terminus of US 1 Truck; western terminus of US 78 Truck; toUSC Aiken | |
| 12.470 | 20.069 |  SC 421 south (Augusta Road) | Northern terminus of SC 421; no left turn allowed from SC 421 NB to US 1 SB/US 78 WB | ||
| 15.620 | 25.138 | SC 19 (Laurens Street) –Eureka,Edgefield | |||
| 15.800 | 25.428 |  SC 19 Conn. (Chesterfield Street) –Savannah River Site | Signed also as SC 19 | ||
| 15.890 | 25.572 | US 1 north (York Street NE) | Eastern end of US 1 concurrency | ||
| | 18.250 | 29.371 |   SC 4 east (Wagener Road) toSC 302 | Western terminus of SC 4 | |
| | 18.450 | 29.692 |  US 78 Truck west /SC 4 Truck east /SC 118 south /SC 302 (Pine Log Road SE) toUS 1 Truck /I-20Module:Jct error: Invalid "to" argument | Western end of SC 4 Truck concurrency; eastern terminus of US 78 Truck; northern terminus of SC 118 | |
| Windsor | 28.880 | 46.478 | SC 4 Truck east (State Park Road) –Aiken State Park, State Park Boat Landing | Eastern end of SC 4 Truck concurrency | |
| | 34.157 | 54.970 |   SC 781 west (Tinker Creek Road) | Eastern terminus of SC 781 | |
| Barnwell | Williston | 37.297 | 60.024 |  SC 39 south (Rosemary Street / Dunbarton Road) | Western end of SC 39 concurrency |
| 37.550 | 60.431 | SC 39 north (Elko Street / Springfield Road) –Springfield | Eastern end of SC 39 concurrency | ||
| Elko | 40.470 | 65.130 |  SC 37 (Bay Street) –Barnwell,Springfield | ||
| Blackville | 46.930 | 75.527 |  US 78 Bus. east (Walker Street) | Signed western terminus of US 78 Bus. | |
| 47.010 | 75.655 |  SC 3 (Solomon Blatt Avenue) –Barnwell | |||
| 47.090 | 75.784 |  SC 304 south (Lartigue Street) –Hilda | Northern terminus of SC 304 | ||
| 47.540 | 76.508 | US 78 Bus. west (Main Street /US 78 Conn. west) | Eastern terminus of US 78 Bus./US 78 Conn. | ||
| Bamberg | Denmark | 55.250 | 88.916 |   US 321 /SC 70 (Palmetto Avenue) –Orangeburg,Barnwell | |
| Bamberg | 61.960 | 99.715 |   US 301 /US 601 –Orangeburg,Allendale,Ehrhardt | ||
| 62.710 | 100.922 |  SC 362 south –Smoaks,Williams | Northern terminus of SC 362 | ||
| | 71.980 | 115.841 |  SC 61 south (Edisto River Road) | Northern terminus of SC 61 | |
| | 72.170 | 116.146 | US 78 Conn. south toSC 61 | Northern terminus of US 78 Conn. | |
| Orangeburg | Branchville | 76.660 | 123.372 |  US 21 south (Freedom Road) –Smoaks,Walterboro,Savannah | Western end of US 21 concurrency |
| 76.860 | 123.694 | US 21 north (Freedom Road) –Orangeburg,Columbia | Eastern end of US 21 concurrency | ||
| Dorchester | St. George | 89.810– 89.830 | 144.535– 144.567 |  I-95 –Savannah,Florence | I-95 exit 77 |
| 91.830 | 147.786 |  US 15 (Parler Avenue) –Walterboro,Santee | |||
| | 105.470 | 169.738 |  US 178 west (East Main Street) –Harleyville | Eastern terminus of US 178 | |
| | 108.176 | 174.092 |  SC 27 north (Ridgeville Road) –Holly Hill | Western end of SC 27 concurrency | |
| | 108.664 | 174.878 | SC 27 south (Ridgeville Road) –Ridgeville | Eastern end of SC 27 concurrency | |
| | 110.114 | 177.211 | School Street west (SC 173 west) / Myers–Mayo Road east | Eastern terminus of SC 173 and School Street; western terminus of Myers–Mayo Road | |
| Summerville | 119.124 | 191.711 |   US 17 Alt. (North Main Street) –Walterboro,Moncks Corner | ||
| 119.404 | 192.162 |  SC 165 (Berlin G. Myers Parkway /US 17 Alt. Truck) –Ravenel | |||
| Charleston | North Charleston | 126.114– 126.139 | 202.961– 203.001 |  I-26 –Columbia,Charleston | I-26 exit 205 |
| 127.534– 128.334 | 205.246– 206.534 |  US 52 west / N.A.D. Road east –Goose Creek,Moncks Corner | Western end of US 52 concurrency; western terminus of N.A.D. Road; interchange | ||
| 129.224 | 207.966 |  US 52 Conn. south toI-26 east –Charleston | Northern 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 Pleasant | I-526 exit 18 | ||
| 137.044 | 220.551 |  SC 642 west (Dorchester Road) | Eastern terminus of SC 642 | ||
| 137.194 | 220.792 |  SC 7 south (Cosgrove Avenue) | Northern terminus of SC 7 | ||
| 137.684 | 221.581 | US 52 east (Carner Avenue) | Eastern end of US 52 concurrency | ||
| Charleston | 142.081 | 228.657 | I-26 east /US 17 south / Carolina Street / Sheppard Street | I-26’s eastbound and US 17’s southbound exit only | |
| 142.207 | 228.860 | Line Street toUS 17 north / King Street east | Eastern terminus; King Street continues past terminus | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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Media related toU.S. Route 78 in South Carolina at Wikimedia Commons U.S. Route 78 | ||
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