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The Highways of South Carolina I-20 
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I-520
I-85
From: I-95I-20 SPUR Florence (Florence County)
To: Georgia State Line in North Augusta(Aiken County).
Nationally, I-20 runs from Florence to I-10 in west Texas.
Total Length: 140.7 miles  
ROUTE LOG
GA STATE LINE: 0 - 0
EXIT 1 - SC 230: 1.3 - 1.3
EXIT 5 - US 25, SC 121: 3.7 - 5.0
EXIT 11 - S-2-144: 6.2 - 11.2
EXIT 18 - SC 19: 6.6 - 17.8
EXIT 22 - US 1: 4.3 - 22.1
EXIT 29 - S-2-49: 7.4 - 29.5
EXIT 33 - SC 39: 3 - 32.5
Lexington-Aiken Line: 4.7 - 37.2
EXIT 39 - US 178: 1.6 - 38.8
EXIT 44 - S-32-44: 5.4 - 44.2
EXIT 51 - S-32-204: 5.8 - 50
EXIT 55 - SC 6: 4 - 54
EXIT 58 - US 1: 2.6 - 56.6
EXIT 61 - US 378: 3.6 - 60.2
EXIT 63 - S-32-273: 2.1 - 62.3
EXIT 64 - I-26 (exit 107), US 76: 0.9 - 63.2
Richland-Lexington Line: 0 - 63.2
EXIT 65 - US 176: 1 - 64.2
EXIT 68 - SC 215: 3.2 - 67.4
EXIT 70 - US 321: 1.4 - 68.8
EXIT 71 - US 21: 1.5 - 70.3
EXIT 72 - SC 555: 1.2 - 71.5
EXIT 73 - SC 277: 0.5 - 72
EXIT 74 - US 1: 1.3 - 73.3
EXIT 76A - I-77 (exit 16): 1.5 - 74.8
EXIT 76B (old exit 76) - S-40-63: 0.5 - 75.3
EXIT 80 - S-40-2033: 4.5 - 79.8
EXIT 82 - S-40-53: 1 - 80.8
Kershaw-Richland Line: 2.8 - 83.6
EXIT 87 - S-28-47: 2.3 - 85.9
EXIT 92 - US 601, SC 12: 4.9 - 90.8
EXIT 98 - US 521: 6.1 - 96.9
EXIT 101 - S-28-329: 3.7 - 100.6
Lee-Kershaw Line: 4.5 - 105.1
EXIT 108 - S-31-31: 1.9 - 107
EXIT 116 - US 15: 8.4 - 115.4
EXIT 120 - SC 341: 3.9 - 119.3
EXIT 123 - S-31-22: 2.6 - 121.9
Darlington-Lee Line: 2.8 - 124.7
EXIT 131 - US 401: 5.2 - 129.9
EXIT 137 - SC 340: 6.5 - 136.4
Florence-Darlington Line: 1.8 - 138.2
EXIT 141 - I-20 Bus, I-95 (exit 160): 2.5 - 140.7
Creation: I-20 first appeared on the 1964 Official Map. It was shown as under construction from SC 6 Lexington to the Wateree River below Camden.
Adjustments: By 1967, I-20 was shown as open from the Georgia Line to US 25-SC 121 and from SC 6 to S-40-53 Pontiac. Additional construction shown was from US 25/SC 121 to US 1. All other segments are shown as proposed.
In 1968 or 1969, I-20 was opened from Pontiac to US 601. Additonally, I-20 was under construction from US 25 to SC 6 and from US 601 to US 521.
In 1970, I-20 was shown under construction from US 521 to I-95.
In 1971, I-20 opened between US 25/SC 121 and SC 6.
In 1973, I-20 was opened from US 601 to US 521.
In 1974, I-20 was opened from US 521 to US 15.
In 1975, I-20 was opened from US 15 to US 401.
In 1976, the last piece of I-20 opened, from US 401 to I-95.
Improvements: 4 lane freeway at inception. I don't believe any 6-lane sections were initially built.
I-20 was widened to 6 lanes between US 1 Lexington and I believe I-77, in stages, beginning I think in the late 1980s. I seem to recall big traffic problems in the SC 215 to US 21 stretch when I was in high school (mid 80s).
At least one exit was not part of the original lineup: Exit 80 Clemson Rd. (btw. 1986-88)
Comment: I-20 serves three major cities in South Carolina - Florence, Columbia, and North Augusta, but only really passes inside northern Columbia.
I-20 received its exit numbers in 1976.
I-20 blows off SC 191, SC 154, and SC 403.
Other than the big cities, I-20 remains a quiet ride through lots of hilly scrub terrain.
I-20 Bus SPUR
From: I-20I-95 Florence (Florence County)
To: US 76 Florence (Florence County).
Total Length: 2.0 miles  
ROUTE LOG
I-20 (exit 141), I-95 (exit 160): 0 - 0
US 76: 2 - 2
Creation: Bus I-20 SPUR first appeared on the 1968 or 1969 Official Map as under construction.
Adjustments: The 1970 Official Map shows I-20 Bus SPUR as open.
Improvements: 4 lane limited access freeway at inception.
Comment: I-20 Spur was not initially posted as a green interstate and I don't know when it was. In fact, the last time I was at the US 76 end it was still normal interstate shields. Also, green 20 has been incorrectly posted as mainline I-20 from one direction on I-95 for many years - photo (thanks to Jeff Morrison).
I-20 Bus SPUR serves a mall and has a couple stop lights, but otherwise offers quick access to Florence proper from I-20

Last Update: 24 April 2006

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