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The Highways of South Carolina US 1 
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US 1
From: Georgia State Line at Augusta, GA (Aiken County)
To: North Carolina State Line above Wallace (Marlboro County)
Total Length: 170.6 miles  
Nationally, US 1 runs from Key West, FL to the Canadian Border at New Kent, ME
ROUTE LOG
GA STATE LINE: 0 � 0
US 25 NB, SC 121 NB: 0.7 - 0.7
I-520: 0.6 - 1.3
SC 421: 0.7 - 2
US 278 EB, SC 125: 0.2 - 2.2
SC 126: 1.6 - 3.8
SC 191: 6.5 - 10.3
SC 118: 2.1 - 12.4
SC 421: 0.2 - 12.6
SC 19 NB: 3.1 - 15.7
SC 19 SB: 0.1 - 15.8
US 78 EB: 0.1 - 15.9
SC 118: 1.5 - 17.4
I-20 (exit 22): 6.8 - 24.2
SC 392: 9.7 - 33.9
SC 39: 3.9 - 37.8
Saluda-Aiken Line: 2.4 - 40.2
Lexington-Saluda Line: 2.4 - 42.6
US 178, SC 391: 1.1 - 43.7
SC 245: 2 - 45.7
SC 23: 1.3 - 47
US 378 WB: 15.1 - 62.1
US 378 EB: 0.7 - 62.8
SC 6: 0.7 - 63.5
I-20 (exit 58): 2.5 - 66
I-26 (exit 111): 5.1 - 71.1
SC 12: 0.5 - 71.6
SC 35, SC 602: 1.9 - 73.5
SC 2: 1.1 - 74.6
US 378 WB: 0.1 - 74.7
Richland-Lexington Line: 0.3 - 75
US 21, US 176, US 321: 0.4 - 75.4
SC 48: 0.6 - 76
US 76 WB: 0.4 - 76.4
US 76 EB, US 378 EB: 0.9 - 77.3
SC 12: 1.8 - 79.1
I-20 (exit 74): 4.3 - 83.4
I-77 (exit 17): 0.8 - 84.2
Kershaw-Richland Line: 8.8 - 93
US 601 SB: 9.6 - 102.6
SC 34 WB: 0.3 - 102.9
US 521, US 601 NB: 3.8 - 106.7
SC 34 EB: 1.4 - 108.1
SC 341: 18.8 - 126.9
Chesterfield-Kershaw Line: 1.8 - 128.7
SC 151: 5.1 - 133.8
SC 145: 1.8 - 135.6
SC 102: 12.8 - 148.4
US 52 SB: 9.9 - 158.3
SC 9 WB: 2.3 - 160.6
US 52 NB: 1.4 - 162
Marlboro-Chesterfield Line: 0.8 - 162.8
SC 9 EB: 1.1 - 163.9
NC STATE LINE: 6.7 - 170.6
Creation: US 1 is an original US Highway, running generally as it does now. Augusta to Aiken, Lexington and West Columbia was part of SC 12; West Columbia to Columbia was part of SC 2; Columbia to Camden, McBee and Cheraw on into North Carolina was part of SC 50.
Adjustments: In 1928, the SC 12 and SC 50 designations were dropped from US 1. SC 2 however remained.
About 1938 US 1 was rerouted in Cheraw to use the current bridge north of town. Before US 1 I don't think made any turns in Cheraw. The Marlboro County side of the river is S-34-52 and S-34-36 to Wallace.
Between 1940-46, US 1 was rerouted through Columbia. Originally US 1 used Gervais, Assembly, Taylor, Two Notch. By 1946, US 1 used Gervais, Harden, Taylor, Two Notch.
In 1951 or 1952, US 1-78 was given a new alignment to bypass Clearwater, Bath, and Gloverville leaving behind SC 421.
Also in 1951 or 1952, US 1 was rerouted in Columbia to use Gervais, Millwood, Two Notch.
Around 1957, US 1-78 was moved off the 5th St bridge over the Savannah River to Augusta onto its current alignment a little south.
Improvements:Upon designation, US 1 was paved Augusta to Aiken and Columbia to Lugoff.
In 1929 or 1930 US 1 was paved from Aiken to Columbia and Lugoff to Bethune.
In 1931 US 1 was paved from Bethune to Patrick.
The remaining piece of US 1 from Patrick to the North Carolina line was paved in 1932.
The first piece of US 1 to be 4-laned was the first couple miles north out of Columbia, about 1940.
By 1946, US 1 was multilaned in West Columbia.
The new alignment from Augusta to Aiken was 4-laned upon construction in 1951 or 1952.
Between 1960-62, US 1 was multilaned on its US 52 and SC 9 duplexes; also US 1 was 4-laned from Camden to about a mile past SC 34 EB split.
By 1963, US 1 was multilane through Columbia.
In 1968 or 1969 US 1 was 4-laned from Lugoff to Camden.
In 1970, US 1 was 4-laned northeast to I-20 in Columbia.
In 1972, US 1 was 4-laned from W. Columbia west to I-26.
In 1973, US 1 was 4-laned from I-26 west to I-20.
In 1974, US 1 was 4-laned from I-20 to I-77 and from I-20 west to Lexington.
In 1975, US 1 was 4-laned on its Lexington US 378 duplex.
In 1976, US 1 was 4-laned west of the US 1-378 split to S-32-204.
In 1978, US 1 was multilaned from I-77 to Pontiac.
In 1997, US 1 was 4-laned from Aiken north to I-20.
In 2001, US 1 was multilaned from S-32-204 west to S-32-24.
Comment: US 1 has undergone relatively little change in its lifetime in South Carolina.
South Carolina is the middle of three states where US 1 doesn't hug I-95. However, in general it is treated as a minor route in SC unlike North Carolina which has widened almost all of it and Georgia which has widened a good amount of it.
Other than the Lexington to Pontiac section, US 1 is an easy, wide open drive.

Last Update: 27 January 2007

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