Interstate 20 cuts a swath across the heart of the Palmetto State, linking the capital city of Columbia with North Augusta to the west and Florence to the east. I-20 is known as the Strom Thurman Freeway throughout South Carolina. Overall the speed limit is 70 miles per hour, with the exception of the Columbia metropolitan area where limits are set at 60 MPH. The freeway between Interstates 26 and 77 is considered the northern third of the Columbia Beltway.

The eastern terminus with Interstate 95 includes access to Business Spur I-20. Business Spur 20 comprises a 1.8-mile long commercial arterial eastward to U.S. 76 at Florence Mall.

The first segment of Interstate 20 open in South Carolina occurred in 1966.1

Interstate 20 South Carolina Highway Guides


Interstate 20 scenes
U.S. 1 enters a diamond interchange with Interstate 20, seven miles north of Aiken. This is the first of three meetings between the two highways. Photo taken 06/24/10.
Interstate 20 leads east directly 46 miles to Columbia from U.S. 1 north while U.S. 1 loops north to Batesburg-Leesville before turning eastward to Lexington and West Columbia. Photo taken 06/24/10.
Alpine Road constitutes a local through road between South Carolina 12 (Percival Road) and U.S. 1 (Two Notch Road) in suburban Richland County. The north-south road sees a diamond interchange with Interstate 20 just east of its stack interchange with Interstate 77. Motorists taking the westbound ramp from Alpine Road can access either freeway. Photo taken 04/14/12.
The ramp from Alpine Road partitions with a left side ramp onto I-20 west to Columbia and a right side ramp onto Exit 76A to either I-77 north to Rock Hill or south to Fort Jackson. Photo taken 04/14/12.
Sally Hill Road, Southborough Road, Corporation Road and South Carolina 340 (Timmonsville Highway) come together at a five-point intersection just south of the Exit 137 diamond interchange with Interstate 20. An I-20 trailblazer was posted at the Sally Hill Road turn onto S.C. 340 north. It has since been replaced. Photo taken 12/15/01.
South Carolina 340 (Timmonsville Highway) ventures east from Alexander Crossroads to the final interchange of Interstate 20 east before the junction with I-95 at Florence. Photo taken 12/15/01.

Sources:

  1. "CAROLINA CENTURY: 1960-1979 INTERSTATE SYSTEM WAS BOON FOR SOME IN S.C., BUT NOT ALL." The State (Columbia, SC), December 21, 1999.


Photo Credits:

12/15/01, 06/24/10, 04/14/12 by AARoads

Connect with:
Interstate 26
Interstate 77
Interstate 95
Interstate 520 - Palmetto Parkway

Page Updated 09-18-2014.