U.S. Route 378

U.S. Route 378(US 378) is a spur ofUS 78in the U.S. states ofGeorgiaandSouth Carolina.TheU.S. Highwayruns 234.30 miles (377.07 km) fromUS 78,Georgia State Route 10(SR 10),SR 17,andSR 47inWashington, Georgia,east toUS 501 BusinessinConway, South Carolina.US 378 connects theCentral Savannah River Areain both states with theMidlandsandPee Deeregions of South Carolina. The U.S. Highway's western portion, which connects Washington andLincolntonin Georgia andMcCormick,Saluda,andLe xing tonin South Carolina, is mainly a rural highway. US 378 is a major suburban and urban highway through Le xing ton and South Carolina'sstate capital,Columbia.The highway has a lengthy concurrency withUS 76between Columbia andSumterand serves as a major route between the Midlands and theMyrtle Beacharea, between which the highway has abusiness routethroughLake City.

U.S. Route 378
US 378 highlighted in red
Route information
Auxiliary route ofUS 78
Length	234.30 mi(377.07 km)
Existed	September 1951–present
Major junctions
West end	US 78/SR 10/SR 17/SR 47inWashington, GA
Major intersections	US 178inSaluda, SC US 1twice inSouth Carolina I-20nearWest Columbia, SC I-26in West Columbia, SC US 21/US 176/US 321inColumbia, SC US 76in Columbia, SC I-77in Columbia, SC US 15/US 401/US 521in Sumter, SC I-95nearTurbeville, SC US 52nearLake City, SC
East end	US 501 Bus.inConway, SC
Location
Country	United States
States	Georgia,South Carolina
Counties	GA:Wilkes,Lincoln SC:McCormick,Edgefield,Saluda,Le xing ton,Richland,Sumter,Clarendon,Florence,Marion,Horry
Highway system
United States Numbered Highway System List Special Divided
←SR 377 GA →SR 378 ←SC 377 SC →SC 381

Route description

Lengths

	mi	km
GA	23.41	37.67
SC	210.89	339.39
Total	234.30	377.07

US 378 has a length of 23.41 miles (37.67 km) in Georgia and spans 210.89 miles (339.39 km) in South Carolina.The U.S. Highway is a part of theNational Highway SystemfromUS 178inSaludaeast toUS 501andUS 701in Conway.

Georgia

Not to be confused withGeorgia State Route 378.

US 378 begins at an intersection on the eastern edge of the city of Washington with US 78, SR 10, and SR 17, which form the north–south axis of the junction, and US 78 Business, SR 47, SR 10 Business, and SR 17 Business, which heads west on Robert Toombs Avenue toward downtown Washington. US 378 and SR 47 head east on Lincolnton Road, also known as Joe Wheeler Highway, which starts as a four-lane divided highway but becomes two lanes a short distance east of the intersection. Shortly after theWilkes–Lincolncounty line, the highways, now part of Washington Highway, meet the western end ofSR 220,a C-shaped route through southern Lincoln County. US 378 and SR 47 gradually curve north and enter the city of Lincolnton as Washington Street. SR 47 splits east from the U.S. Highway andSR 43begins to run concurrently with US 378 at their intersection with Elm Street. The highways pass along the west side of downtown Lincolnton and curve northeast, meeting the southern end ofSR 79(Goshen Street) before leaving the city.

US 378 and SR 43 continue northeast on McCormick Highway, which meets the northern end ofSR 43 Connector(Old Petersburg Road) a short distance east of the city limits at Wright's Crossing.The highways cross the Soap Creek branch of theSavannah Riverreservoir known asClarks Hill Lakein Georgia andLake Strom Thurmondin South Carolina.

South Carolina

State line to Saluda

US 378 and SR 43 meet the eastern end of SR 220 just west ofElijah Clark State Park.SR 43 reaches its northern terminus at the state line at thethalwegof the Savannah River in the center of the lake crossing.US 378 entersSumter National Forestand crosses theLittle Riverbranch of the lake, on the east side of which isBaker Creek State Park.The highway continues to the town of McCormick, through which the highway follows Gold Street. US 378 intersectsSC 28(Mine Street) on the west side of downtown;US 221leaves its concurrency with SC 28 coming fromAugustaand joins US 378 through the downtown area. The U.S. Highways have a grade crossing ofCSX'sMcCormick Subdivisionand diverge on the east side of town, with US 221 heading northeast as Greenwood Highway.

US 378 leaves McCormick, passesMcCormick County Airport,and forms the southern boundary of Sumter National Forest east of the town. East of Liberty Hill, where the highway fully enters the national forest, the road crosses theMcCormick–Edgefieldcounty line. US 378 again forms the southern boundary of Sumter National Forest from its intersection withSC 67(Callison Highway). The highway also intersectsUS 25andSC 430(Meeting Street Road) while passing along the northern tier of Edgefield County. US 378 leaves the national forest shortly after enteringSaluda County.The highway enters the town of Saluda along Church Street and intersects Main Street, which carries US 178,SC 39,andSC 121.Two blocks to the east, US 378 turns north onto Jennings Street, then turns east on Travis Avenue at its junction withSC 194,which heads north on Jennings Street, and US 178 Connector, which heads west on Travis Avenue to connect with US 178.

Saluda to Sumter

US 378 crosses theLittle Saluda Riverand leaves Saluda along Columbia Highway. After crossing Clouds Creek, the highway meetsSC 391(Prosperity Highway/Summerland Highway) at aroundaboutand entersLe xing ton County.East of the Hollow Creek and Horse Creek branches ofLake Murray,US 378 expands to a four-lane road with center turn lane. The highway becomes concurrent with US 1 (Main Street) on the western edge of the town of Le xing ton. After US 1 splits southeast to head to the center of town, US 378 continues on Columbia Avenue, then has a brief concurrency withSC 6along Lake Drive. The U.S. Highway exits the town along Sunset Boulevard. US 378 has apartial cloverleafinterchange withI-20and asingle-point urban interchangewithI-26before entering the city of West Columbia. The highway meets the northern ends ofSC 35(12th Street) andSC 12 Connector(9th Street), which provides access to westbound SC 12. East of the connector route, US 378 becomes a four-lane undivided highway. The highway has a partial interchange with SC 12 (Jarvis Klapman Boulevard) that only allows access to and from Columbia.

US 378 meets US 1 (Meeting Street) and the northern end ofSC 2(State Street) just before the two U.S. Highways cross theCongaree Riveron the four-lane Gervais Street Bridge intoRichland Countyand the city of Columbia. The highways follow four-lane divided Gervais Street pastEdVentureand theSouth Carolina State Museumand intersect Huger Street, which carriesUS 21,US 176,andUS 321.US 378 and US 1 cross overNorfolk Southern Railway'sW Lineand pass through theCongaree Vistaneighborhood. At the intersection withSC 48(Assembly Street), the highways pass between theSouth Carolina State HouseandCapitol Center.US 378 begins its long concurrency with US 76 when the latter highway turns onto Gervais Street from Bull Street. The three U.S. Highways cross over Norfolk Southern'sColumbia Districtrail line before reaching Millwood Avenue, where US 1 turns north and US 378 and US 76 turn south. Gervais Street continues east as an unnumbered street several blocks through a residential area before reaching its eastern terminus.

US 378 and US 76 follow Millwood Avenue, a four-lane street with center turn lane, southeast to an oblique intersection with Devine Street. Devine Street carries US 21 Connector and US 76 Connector west throughFive Pointsand theUniversity of South Carolinacampus. The U.S. Highways continue east along Devine Street to their intersection withSC 16(Beltline Boulevard), where the road expands to six lanes. A short distance to the east, US 378 and US 76 have an intersection withSC 760(Fort Jackson Boulevard), which heads east toward thenamesake military installation,and a second US 76 Connector that follows Cross Hill Road north to SC 16. East of their intersection with a third US 76 Connector, which heads east on Wildcat Road and west on Rosewood Drive, the U.S. Highways continue as Garners Ferry Road. US 378 and US 76 meet the western end ofSC 262(Leesburg Road) just west of the U.S. Highways' and state highway's partial cloverleaf interchanges withI-77(Veterans Memorial Freeway). Southeast of I-77, the road becomes a four-lane divided highway, leaves the city of Columbia, and meet the northern end ofSC 768(Pineview Road). US 378 and US 76 enter a rural area and pass throughHorrell Hill,where they meet the northern end ofSC 769(Congaree Road), passMcEntire Joint National Guard Base,and have a junction with the western end ofSC 764(Old Eastover Road). The U.S. Highways have adiamond interchangewithUS 601(McCords Ferry Road) and an intersection withSC 263(Vanbloken Road) north ofEastoverbefore they cross theWateree RiverintoSumter County.

Sumter to Conway

East of the extensive swamp surrounding the Wateree River, US 378 and US 76 pass south of the village ofStateburgand intersectSC 261(Kings Highway). East ofSC 441,Peach Orchard Road/Patriot Parkway), the U.S. Highways enter the city of Sumter, through the western portion of which they follow Broad Street. US 378 and US 76 have atrumpet interchangewith Shaw Drive, the main access toShaw Air Force Base,and follow the southern boundary of the military reservation. East of the base, the highways pass through a commercial area and meet the northern end ofSC 120(Alice Drive) just west of where Broad Street continues alongUS 76 Businesswhile the U.S. Highways continue along the Robert E. Graham Freeway. Just east of the business route, US 378 and US 76 have a half-diamond interchange withUS 521(Camden Highway) allowing access with US 521 to and from the east; the other movements are made via US 76 Business and Jefferson Road. A pair of frontage roads parallels the freeway; the U.S. Highways haveright-in/right-outinterchanges with the frontage roads just west of the overpass ofUS 15(Main Street). The frontage roads end at the freeway's diamond interchange withUS 401.US 378 and US 76 cross a rail spur before highways exit the city of Sumter and the frontage roads reappear along the freeway. The U.S. Highways diverge at their partial cloverleaf interchange with the eastern end of US 76 Business (Liberty Street); US 76 heads east as Florence Highway while US 378 continues southeast along the freeway toEast Sumter,where it ends at the eastern terminus ofSC 763(Myrtle Beach Highway).

US 378 continues east as Myrtle Beach Highway, a four-lane divided highway. The highway crosses theBlack Riverand intersectsSC 527(Brick Church Road) at McBrides Corner. US 378 has an acute junction withSC 53(Narrow Paved Road) and a diamond interchange withI-95before enteringClarendon County,where the route follows Clarence Coker Highway. The highway becomes undivided as it enters the town ofTurbeville.US 378 runs concurrently withUS 301along four-lane undivided Main Street, which intersectsSC 58(Gamble Street) one block north of the US 378–US 301 junction. The two U.S. Highways split near the northern end of town, with US 378 continuing east as a four-lane road with center turn lane. The highway entersFlorence County,where its name changes to Turbeville Highway, then returns to the county line and runs atop the southern boundary of Florence County. During this stretch, the county to the south of the highway becomesWilliamsburg County.Soon after US 378 fully enters Florence County, the highway intersectsSC 341(Olanta Highway). The two highways briefly run together before SC 341 continues straight concurrent with US 378 Business on Lake City's Main Street while US 378 splits northeast to bypass Lake City. North of the town, the U.S. Highway has a diamond interchange withUS 52(Ron McNair Boulevard). US 378 crosses over CSX'sCharleston Subdivisionbefore collecting the eastern end of US 378 Business (Myrtle Beach Highway).

US 378 continues northeast as Myrtle Beach Highway. The highway crosses theLynches Riverand curves southeast and then east through the hamlet ofHannah.SC 51(Pamplico Highway) joins US 378 on a tangent curve at Salem and follows the U.S. Highway east to Kingsburg, where SC 51 turns south onto Kingsburg Highway andSC 41joins the U.S. Highway as it curves northeast U.S. Highway 378 reduces to two lanes near Capitola Road in Johnsonville. and crosses theGreat Pee Dee RiverintoMarion County.The two highways curve southeast and cross over CSX'sAndrews Subdivisionbefore SC 41 splits to the north on a tangent curve. The U.S. Highway meets the southern end ofSC 908south ofBrittons Neckbefore it curves east and crosses theLittle Pee Dee RiverintoHorry County.US 378 expands to a four-lane road with center turn lane shortly after passingConway-Horry County Airportand enters the city of Conway as Wright Boulevard. West of downtown, the U.S. Highway has an oblique intersection with Church Street, which carries US 501 through the intersection and US 701 north of the intersection. Southbound US 701 continues south on Church Street to a ramp to 4th Avenue while northbound US 701 runs concurrently with US 378 from 4th Avenue, which heads west as US 701 towardGeorgetownand east asSC 905.US 378 curves northeast, becomes 3rd Avenue, and reduces to two lanes as it enters theConway Downtown Historic District,where it reaches its eastern terminus at US 501 Business (Main Street) next to theOld Conway County Courthouse.

History

In the early part of the 21st century, the bridge crossing the Georgia–South Carolina state line over the Savannah River was deemed to be "structurally deficient". It wasn't until 2014 thatAlabama-based Scott Bridge Company began construction on a replacement for the bridge. It wasn't determined that the bridge was in danger of collapse; rather, the term was used in reference to a possible crack or split in the concrete of the bridge. Construction began in April 2010. However, in 2012, construction was halted due to a "rare chemical reaction", known as delayedettringite.This condition caused the support columns of the bridge to swell up and begin splitting.It was the first time this condition was ever encountered in Georgia. It was discovered after personnel fromGDOT,Scott Bridge Company, and scientists from theGeorgia Institute of Technologyconducted a thorough examination of the bridge and supporting structure.In Spring 2014, construction resumed, using a new method in which water cools freshly-poured concrete while it cures. The $36.2 million bridge opened on December 21, 2016.

South Carolina Highway 54

South Carolina Highway 54
Location	Sumter–Salem
Existed	c.1926–1951

South Carolina Highway 54(SC 54) was astate highwaythat was established around 1926 fromSC 3(nowUS 76 Business) inSumtereast toSC 4(nowUS 301) inTurbeville.In 1929, it was extended to the east to end atSC 341inLake City.In 1939, SC 54, along withUS 52and SC 341, was extended farther into Lake City. Then, SC 54 was extended toSC 51inSalem.Between 1943 and 1947, its path just west of theLynches Riverwas straightened out. In late 1951, it wasdecommissioned;most of its path was redesignated as part of US 378.

Major intersections

State	County	Location	mi	km	Destinations	Notes
Georgia	Wilkes	Washington	0.00	0.00	US 78/SR 10/SR 17(Sam McGill Parkway) –Elberton,Athens,Le xing ton,Richard B. Russell State Park US 78 Bus.west /SR 10 Bus.west /SR 17 Bus.north /SR 47west (R. Toombs Avenue) –Washington,Crawfordville	Western terminus; west end of concurrency with SR 47
		Logan			SR 47 Conn.south toUS 78east /SR 10east /SR 17south –Thomson
	Lincoln	​	13.22	21.28	SR 220east –Thomson
		Lincolnton	15.93	25.64	SR 43south /SR 47east (Elm Street) –Appling,Augusta	East end of concurrency with SR 47; west end of concurrency with SR 43
			16.96	27.29	SR 79north (Goshen Street) –Elberton
		​	17.79	28.63	SR 43 Conn.south (Old Petersburg Road) –Appling
		​	21.47	34.55	SR 220west –Kenna
Savannah River			23.41 0.00	37.67 0.00	Lake Strom Thurmond/Clarks Hill Lake—Georgia–South Carolinastate line
South Carolina	McCormick	McCormick	7.04	11.33	US 221south /SC 28(Mine Street) –Abbeville,Augusta	West end of concurrency with US 221
			7.61	12.25	US 221north (Greenwood Highway) –Greenwood	East end of concurrency with US 221
	Edgefield	​	17.82	28.68	SC 67north (Callison Highway) to Walker Road (S-19-35) /SC 283–Callison,Greenwood
		​	21.92	35.28	US 25–Greenwood,Edgefield
		Meeting Street	28.85	46.43	SC 430south (Meeting Street Road) –Edgefield
	Saluda	Saluda	39.46	63.50	US 178/SC 39/SC 121(Main Street) –Greenwood,Johnston
			39.83	64.10	SC 194north (North Jennings Street) to Travis Avenue (US 178 Conn.west) west /US 178–Newberry,Greenwood
		​	53.83	86.63	SC 391(Prosperity Highway / Summerland Highway) –Prosperity,Batesburg,Camp Barstow	Traffic circle
	Le xing ton	Le xing ton	71.37	114.86	US 1south (West Main Street) –Aiken,Batesburg-Leesville	West end of concurrency with US 1
			72.03	115.92	US 1north (West Main Street) –Columbia	East end of concurrency with US 1
			72.70	117.00	SC 6south (North Lake Drive) – Business District	West end of concurrency with SC 6
			72.99	117.47	SC 6north (North Lake Drive)	East end of concurrency with SC 6
		​	78.10	125.69	I-20–Florence,Augusta	I-20 exit 61
		​	80.44	129.46	I-26–Spartanburg,Charleston	I-26 exit 110
		West Columbia	82.36	132.55	SC 35south (12th Street)
			82.92	133.45	9th Street (SC 12 Conn.south)
			83.47	134.33	SC 12east –Columbia	Interchange
			83.72	134.73	US 1south (Meeting Street) toI-26west / State Street (SC 2south)	West end of concurrency with US 1
	Richland	Columbia	84.36	135.76	US 21/US 176/US 321(Huger Street)
			84.98	136.76	SC 48(Assembly Street)
			85.38	137.41	US 76west (Bull Street)	West end of concurrency with US 76
			86.36	138.98	US 1north (Millwood Avenue) –Camden	East end of concurrency with US 1
			87.77	141.25	Devine Street west (US 76 Conn.west /US 76 Conn.west) toUS 21/US 321/ Millwood Avenue ends	Eastern terminus of US 21 Conn. and western segment of US 76 Conn., which use Devine Street
			88.66	142.68	SC 16(Beltline Boulevard)
			88.87	143.02	SC 760east (Fort Jackson Boulevard) toSC 16north (US 76 Conn.west) / Cross Hill Road	Eastern terminus of central segment of US 76 Conn.; western terminus of SC 760
			89.11	143.41	Rosewood Drive west / Wildcat Road east (US 76 Conn.) –Midlands Technical CollegeBeltline Campus,Jim Hamilton–L.B. Owens Airport,Fort Jackson	Eastern segment of US 76 Conn.
			90.44	145.55	SC 262east (Leesburg Road)
			90.63	145.85	I-77–Charlotte,Charleston,Spartanburg	I-77 exit 9
		​	92.94	149.57	SC 768south (Pineview Road)
		​			Old Hopkins Road (S-40-222) -Hopkins
		Horrell Hill	98.17	157.99	SC 769south (Congaree Road) –Gadsden
		​	102.56	165.05	SC 764east (Old Eastover Road) –Eastover
		​	107.55	173.08	US 601(McCords Ferry Road) –St. Matthews,Camden	Diamond interchange
		​	109.87	176.82	SC 263south (Vanboklen Road) –Eastover
	Sumter	Stateburg	117.18	188.58	SC 261(Kings Highway) –Pinewood,Camden
		​	118.89	191.33	SC 441(Peach Orchard Road/Patriot Parkway) –Bishopville
		Sumter	119.32	192.03	Shaw Drive –Shaw Air Force Base	Trumpet interchange
			125.69	202.28	SC 120south (Alice Drive)
			125.91	202.63	US 76 Bus.east (Broad Street) toUS 521	No access from westbound US 378 to eastbound US 76 Business
			126.31	203.28	US 521(Camden Highway) –Camden	Westbound exit, eastbound entrance
			128.31	206.49	US 15(Main Street) –Bishopville	Right-in/right-outinterchanges with frontage roads
			130.08	209.34	US 401(Oswego Highway) –Darlington	Diamond interchange
			130.96	210.76	US 76east (Florence Highway) /US 76 Bus.west (Liberty Street) –Florence	East end of concurrency with US 76
		East Sumter	132.34	212.98	SC 763south (Myrtle Beach Highway) –Sumter	No direct access from eastbound SC 763 to westbound US 378
		​	141.05	227.00	SC 527(Brick Church Road) –Bishopville,Kingstree
		​	142.58	229.46	SC 53east (Narrow Paved Road) –Shiloh
		​	144.30	232.23	I-95–Florence,Savannah	I-95 exit 135
	Clarendon	Turbeville	148.75	239.39	US 301south (Main Street) –Manning	West end of concurrency with US 301
			148.85	239.55	SC 58north (Gamble Street) –Shiloh
			149.47	240.55	US 301north –Olanta	East end of concurrency with US 301
	Florence	​	162.25	261.12	SC 341west (Olanta Highway) –Olanta	West end of concurrency with SC 341
		​	162.51	261.53	US 378 Bus./SC 341east (Main Street) –Lake City	East end of concurrency with SC 341
		​	164.77	265.17	US 52(Ron McNair Boulevard) –Lake City,Scranton	Diamond interchange
		​	165.87	266.94	US 378 Bus.west (Myrtle Beach Highway) –Lake City
		​	181.03	291.34	SC 51north (Pamplico Highway) –Pamplico	West end of concurrency with SC 51
		​	184.47	296.88	SC 41/SC 51south (Kingsburg Highway) –Johnsonville	East end of concurrency with SC 51; west end of concurrency with SC 41
	Marion	​	188.01	302.57	SC 41north –Mullins	East end of concurrency with SC 41
		​	193.54	311.47	SC 908north –Brittons Neck
	Horry	Conway	210.02	337.99	US 501/US 701(Church Street /US 378 Trucknorth /US 701 Trucknorth /SC 90 Truckeast) –Myrtle Beach,Marion	Western end of northbound US 701 concurrency; southern terminus of US 378 Truck and US 701 Truck; western terminus of SC 90 Truck
			210.19	338.27	US 701south /SC 905north (4th Avenue /US 378 Trucksouth /US 701 Trucksouth) –Georgetown,Longs	Eastern end of northbound US 701 concurrency; northern terminus of US 378 Truck and US 701 Truck
			210.89	339.39	US 501 Bus.(Main Street) / 3rd Avenue east –Loris,Myrtle Beach,North Myrtle Beach	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrencyterminus Incomplete access

Special routes

Sumter business loop

U.S. Highway 378 Business
Location	Sumter, South Carolina
Length	6.6 mi(10.6 km)
Existed	1958–1975

U.S. Route 378 Business(US 378 Bus.) was a 6.6-mile (10.6 km)business routeof US 378 that existed inSumter.It used Broad Street, Liberty Street, and Myrtle Beach Boulevard. It was established in 1958 as a renumbering of mainline US 378 through downtown Sumter.

Lake City business loop

U.S. Highway 378 Business
Location	Lake City, South Carolina
Length	4.490 mi(7.226 km)
Existed	1958–present

U.S. Route 378 Business(US 378 Bus.) is a 4.490-mile (7.226 km)business routeof US 378 throughLake City.The highway travels from US 378 andSouth Carolina Highway 341(SC 341) west of the city to US 378 east of the city. US 378 Bus. begins heading east from US 378 (Turbeville Highway)concurrentwith SC 341 along two-lane Main Street. The two highways enter the city just east of Lake City Memorial Park. In the center of the city, US 378 Bus. and SC 341 have anintersectionwithUS 52(Ron McNair Boulevard). Oneblockafter their grade crossing ofCSX'sCharleston Subdivision,the highways diverge. The main highway continues east on Main Street while the business route turns north onto Church Street. US 378 Bus. leaves thecity limitsat its crossing of Lake Swamp and reaches its eastern terminus at US 378 (Myrtle Beach Highway).

Conway truck route

U.S. Highway 378 Truck
Location	Conway, South Carolina
Length	27.328 mi(43.980 km)

U.S. Route 378 Truck(US 378 Truck) is atruck routeof US 378 that partially exists inConwayandRed Hill.It directstrucktraffic ontoUS 501,South Carolina Highway 544 Connector (Red Hill 1)(SC 544 Conn.),US 501 Business(US 501 Bus.),SC 90,Old Reaves Ferry Road, andSC 905.Its entire length isconcurrentwithUS 701 Truck.It is loosely signed, frequently in Conway and Red Hill, and infrequently outside thecity limitsof both locales.

See also

• U.S. roads portal
• Georgia (U.S. state) portal
• United States portal

External links

Template:Attached KML/U.S. Route 378

KML is not from Wikidata

• The Highways of South Carolina: US 378
• Endpoints of U.S. Highway 378