Interstate 26 in South Carolina

Interstate 26
Route information
	Maintained by SCDOT
Length:	220.7 mi (355.2 km)
Existed:	1960 – present
Major junctions
West end:	I‑26 at the NC line near Landrum
	I-85 near Spartanburg; I-385 in Clinton; I-20 near Columbia; I-126 in Columbia; I-77 in Cayce; I-95 near Holly Hill; I-526 in North Charleston
East end:	US 17 in Charleston
Location
Counties:	Spartanburg, Laurens, Newberry, Richland, Lexington, Calhoun, Orangeburg, Dorchester, Berkeley, Charleston
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; South Carolina Highways; Interstate; U.S.; State; Scenic;

Interstate 26 (I-26) is a South Carolina Interstate highway running generally east–west from near Landrum, in Spartanburg County, to U.S. Route 17, in Charleston, South Carolina. It is also the longest interstate highway in South Carolina.

Route description

I-26 runs 220 miles through South Carolina. Mile markers run from west (north) to east (south). Mile Marker 0 is in the mountains at the NC state line. The last exit, at US 17 south of Charleston, is exit 221.

I-26 runs between the Broad and Saluda Rivers, descending from the mountains to the piedmont or midlands. At Columbia, I-126 crosses the confluence of the Broad and Saluda, which together form the Congaree, near the Columbia Canal and water treatment plant. I-26 continues following the Congaree, until it hops south over into the Cooper and Ashley Drainage, then down to the coast.

I-26 is predominantly a four-lane rural interstate with 70-mile-per-hour (110 km/h) speed limits. In the Columbia and Charleston areas, the interstate widens to six-lanes, but speeds are lower.

I-26 enters South Carolina just northeast of Landrum, traveling a southeasterly direction. The first major city along its route is Spartanburg, where it intersects I-85 to Greenville and Charlotte. As the interstate weaves along the terrain, it reaches Clinton; where westbound travelers can connect with I-385 towards Greenville. Traveling through the Sumter National Forest, it connects with Newberry before entering the Midlands. At Columbia, it connects with I-20, to Augusta and Florence, and I-126 towards the downtown area; it then goes south over the Saluda River and into Lexington County for the second of eventually four times along its course. At Cayce, it connects with I-77 to Charlotte. South of Cayce, the interstate goes up and down a few very long hills before reaching the outskirts of Orangeburg and I-95, to Savannah and Florence. As it enters the relatively flat plains of the Lowcountry, the area becomes urbanized as the interstate encroaches upon North Charleston and Charleston. As the interstate curves through the peninsula formed by the Ashley and Cooper rivers, it connects with I-526, to Savannah and Mount Pleasant. Near the end, it overlaps with US 17 from its new interchange (from the Arthur Ravenel Jr. Bridge) to where the old interchange remnants and where I-26 ends (formally where the John P. Grace Memorial Bridge and Silas N. Pearman Bridge connected).

History

East I-26 in South Carolina at mile marker 79, just south of Newberry

Construction of I-26 began in 1957 in the Columbia area with the 9-mile (14 km) section from the Broad River to near Irmo.^[2] The 11-mile (18 km) section of I-26 from I-126/US 76 in Columbia to US 176 at Exit 97 was the first section of the highway to open up to traffic (on September 7, 1960). The 6-mile (9.7 km) section from SC 210 to US 15 opened in September 1962.^[3] Construction proceeded in stages heading both west up towards Greenville and east towards Charleston. The highway was largely completed from Columbia to North Charleston by 1964; the section from Aviation Avenue to the highway's terminus at US 17 in downtown Charleston progressed more slowly due to land takings for the right of way and numerous bridges and viaducts that had to be built. The entire 221 miles of I-26 were completed by February 1969.^[2]

In the 1980s-90s, I-26 around Columbia was widened from four to six lanes. In the mid-90s, the North Charleston area was also widened from four to six lanes. In 2005, the US 17 was realigned to a new interchange with I-26 at exit 220 from exit 221; the old interchange was mostly torn down and reconfigured, leaving the I-26 viaduct eastbound off-ramp and westbound on-ramps with US 17 south.

Auxiliary routes in South Carolina

Interstate	City	Type	Notes
Interstate 126	Columbia	Spur
Interstate 326	Columbia	Spur	Unsigned designation. Decommissioned.
Interstate 526	Charleston	Spur

Exit list

County	Location	mi^[1]	km	Exit	Destinations	Notes
Spartanburg	State line	0.0	0.0		I‑26 west – Hendersonville, Asheville	Continuation into North Carolina
	Landrum	0.9	1.45	1	SC 14 east – Landrum
		5.3	8.5	5	SC 11 (Cherokee Foothills Scenic Highway) – Campobello, Chesnee
		10.0	16.1	10	SC 292 – Inman
		14.0	22.5	15	US 176 – Inman, Spartanburg
		15.4	24.8	16	John Dodd Road – Wellford
	Southern Shops	16.7	26.9	17	New Cut Road
		17.8	28.6	18	I-85 – Greenville, Charlotte	Signed as exits 18A (south) and 18B (north)
		18.6	29.9	19	I-85 Bus. – Greenville, Spartanburg	Signed as exits 19A (south) and 19B (north)
	Spartanburg	21.0	33.8	21	US 29 – Greer, Spartanburg	Signed as exits 21A (south) and 21B (north); to Westgate Mall
	Spartanburg	22.0	35.4	22	SC 296 (Reidville Road) – Spartanburg, Reidville
	Moore	28.1	45.2	28	US 221 – Spartanburg, Moore, Woodruff
		34.5	55.5	35	Walnut Grove Road – Woodruff
		38.0	61.2	38	SC 146 – Cross Anchor, Woodruff
		40.6	65.3	41	SC 92 – Enoree, Cross Anchor
		44.1	71.0	44	SC 49 – Laurens, Cross Anchor, Union
Laurens	Clinton	51.8	83.4	51	I-385 north – Laurens, Greenville	Westbound exit and eastbound entrance
		52.5	84.5	52	SC 56 – Clinton, Cross Anchor
		53.6	86.3	54	SC 72 – Clinton, Whitmire
		59.7	96.1	60	SC 66 (Whitmire Highway) – Joanna, Whitmire
Newberry		66.2	106.5	66	Road 32 – Jalapa
		71.5	115.1	72	SC 121 – Newberry, Whitmire
	Newberry	74.0	119.1	74	SC 34 – Newberry, Winnsboro
	Newberry	76.0	122.3	76	SC 219 – Newberry, Pomaria
		82.2	132.3	82	SC 773 – Prosperity, Pomaria
		85.2	137.1	85	SC 202 – Pomaria, Little Mountain
Lexington	Chapin	91.2	146.8	91	Columbia Avenue – Chapin
Richland		96.5	155.3	97	US 176 – Ballentine, White Rock, Peak
	Irmo	101.4	163.2	101	US 76 west / US 176 (Broad River Road) – Ballentine, White Rock	West end of US 76 overlap; signed as exits 101A (west) and 101B (east)
	Irmo	102.2	164.5	102	SC 60 (Lake Murray Boulevard) – Lake Murray, Irmo	Signed as exits 102A (west) and 102B (east)
	Columbia	103.4	166.4	103	Harbison Boulevard	To Columbiana Centre
Lexington	Seven Oaks	104.3	167.9	104	Piney Grove Road
Lexington	Seven Oaks	106.4	171.2	106	St. Andrews Road
Richland	St. Andrews	107.1	172.4	107	I-20 – Augusta, Florence	Signed as exits 107A (west) and 107B (east)
	Columbia	107.6	173.2	108A	Bush River Road
	Columbia	107.8	173.5	108B	I-126 east / US 76 east – Downtown Columbia	East end of US 76 overlap
Lexington	West Columbia	109.7	176.5	110	US 378 – Lexington, West Columbia
	West Columbia	111.3	179.1	111	US 1 to SC 12 – Lexington, West Columbia	Signed as exits 111A (south) and 111B (north)
	Cayce	113.2	182.2	113	SC 302 – Columbia Airport, Cayce
		115.1	185.2	115	US 21 / US 176 / US 321 – Gaston, Cayce
		115.6	186.0	116	I-77 north – Charlotte
		119.5	192.3	119	US 21 / US 176 – St. Matthews, Dixiana
Calhoun		124.6	200.5	125	Old Sandy Run Road – Gaston	Closed during USMC Mud Run
Lexington		128.7	207.1	129	US 21
Calhoun		136.3	219.4	136	SC 6 – North, St. Matthews, Swansea
Calhoun		139.3	224.2	139	Burke Road – St. Matthews
Orangeburg		145.3	233.8	145	US 601 – Orangeburg, St. Matthews	Signed as exits 145A (south) and 145B (north)
		148.5	239.0	149	SC 33 – Orangeburg, Cameron	To SC State University and Claflin University
		154.2	248.2	154	US 301 – Orangeburg, Santee	Signed as exits 154A (south) and 154B (north)
		159.0	255.9	159	Homestead Road – Bowman
		164.7	265.1	165	SC 210 – Bowman, Vance
		168.5	271.2	169	I-95 – Savannah, Florence	Signed as exits 169A (south) and 169B (north)
Dorchester		171.5	276.0	172	US 15 – St. George, Santee, Holly Hill	Signed as exits 172A (south) and 172B (north)
		177.0	284.9	177	SC 453 – Harleyville, Holly Hill
		187.4	301.6	187	SC 27 – Ridgeville, St. George
Berkeley		194.4	312.9	194	Road 16 – Jedburg, Pinopolis
	Summerville	199.0	320.3	199	US 17 Alt. – Summerville, Moncks Corner	Signed as exits 199A (south) and 199B (north)
	Ladson	203.2	327.0	203	College Park Road – Ladson
Charleston	North Charleston	205.0	329.9	205	US 78 to US 52 – Goose Creek, Ladson	Signed as exits 205A (west) and 205B (east); to Charleston Southern University
					Future Drive	Proposed interchange (funded only for right of way procurement)^[4]
		208.1	334.9	209A	US 52 / US 78 – Goose Creek, Moncks Corner	Westbound exit and eastbound entrance
		208.6	335.7	209B	Ashley Phosphate Road	Signed as exit 209 eastbound; to Northwoods Mall
		211.1	339.7	211A	Aviation Avenue – Charleston AFB
		211.6	340.5	211B	Remount Road – Hanahan	Formerly exit 211 before 2012
		212.6	342.1	212	I-526 – Savannah, Mount Pleasant	Signed as exits 212B (west) and 212C (east)
		213.5	343.6	213	Montague Avenue / Tanger Outlet Boulevard / Mall Drive	Signed as exits 213A (west) and 213B (east) eastbound
		215.5	346.8	215	SC 642 (Dorchester Road)
		216.3	348.1	216	SC 7 (Cosgrove Avenue) – Federal Complex	Signed as exits 216A (south) and 216B (north)
	Charleston	217.5	350.0	217	US 52 (North Meeting Street)	Eastbound exit and westbound entrance
		218.0	350.8	218	Spruill Avenue – Federal Complex	Westbound exit and eastbound entrance
		219.0	352.4	219A	Rutledge Avenue – The Citadel	Eastbound exit and westbound entrance
		219.3	352.9	219B	Morrison Drive, East Bay Street (US 52 Spur)	Eastbound exit and westbound entrance
		220.2	354.4	220A	Romney Street	Westbound exit only
		220.3	354.5	220B	US 17 north – Mount Pleasant, Georgetown	North end of US 17 overlap; signed as exit 220 eastbound
		220.4	354.7	221A	US 17 south – Savannah	South end of US 17 overlap; eastbound exit and westbound entrance
		220.4	354.7	221B	US 52 (Meeting Street) – Charleston Downtown	Eastbound exit and westbound entrance I-26 officially ends .3 miles (0.48 km) at the remnants of old exit 221
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access Unopened