Interstate 526

Interstate 526
Mark Clark Expressway
I-526 highlighted in red; future section in blue; unbuilt future section in orange
Route information
Auxiliary route of I-26
Maintained by SCDOT
Length	19.56 mi[1][2] (31.48 km)
Existed	1989–present
NHS	Entire route
Major junctions
West end	US 17 / SC 7 in Charleston
Major intersections	I-26 in North Charleston US 52 / US 78 in North Charleston
East end	US 17 / I-526 BS in Mount Pleasant
Location
Country	United States
State	South Carolina
Counties	Charleston, Berkeley
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future South Carolina State Highway System Interstate US State Scenic
← SC 522 → SC 527

Interstate 526 (I-526) is a 19.56-mile (31.48 km) auxiliary route of I-26, providing a partial beltway around Charleston, South Carolina, in the United States. The route serves several purposes, firstly, as a bypass for through traffic on U.S. Route 17 (US 17) to avoid downtown Charleston, and, secondly, for traffic on I-26 bound for the coastal towns located north and south of Charleston. The route is not yet complete, as the western terminus it is planned for the route to be extended an additional 10 miles (16 km). After the eastern terminus, the roadway continues as a short business route, known as Interstate 526 Business (I-526 Bus.).