I-126 Business

Interstate Business Route 26

There are no business routes for Interstate 26, but two of its branch routes have spurs. SCDOT utilizes Spur and Connector routes as part of its U.S. and State Highway inventory, though these are seldom signed. Five Interstate Business Spurs are included in this system, though only two are signed (the east ends of I-20 and I-526). All five otherwise consist of arterial or surface street extensions from freeway ends. These include the north end of I-385, the south end of I-585 and the east end of I-126.

Interstate Business Route 126


Active Business Route

Business Spur I-126 overlays a half mile section of Elmwood Avenue from the freeway end of I-126 at Huger Street (U.S. 21-176-321) east to Main Street. Outside of one sign on Elmwood Avenue west at Main Street, the route is unposted, as U.S. 21-76-176-321 also travel the six-lane arterial.

Paul Martin discussed the designation with a contact at SCDOT, and was told that the business spur does not exist, and it never appeared on their planning maps from the late 1950s onward. However there was a possibility that the spur existed unofficially.1

Interstate Business Route 526

I-526 Business

Mount Pleasant

Active Business Route

Located in the Charleston suburb of Mt. Pleasant, Business Spur I-526 is Chuck Dawley Boulevard, a 1.3 mile route connecting the east end of Interstate 526 with South Carolina Highway 703 (Coleman Boulevard). The five lane boulevard serves a residential area south from U.S. 17 to S.C. 703 as part of a route to the beaches on Sullivan’s Island.

S.C. 703 east from the Arthur Ravenel, Jr. Bridge to Chuck Dawley Boulevard, and Business Spur I-526 east back to U.S. 17, follow the pre-1960s route of both U.S. 17/701 through Mount Pleasant. The two routes were later signed as U.S. 17 Business and named Old Georgetown Highway when a new alignment for U.S. 17 opened to the north. Further changes took place when South Carolina submitted an application to the American Association of State Highway and Transportation Officials (AASHTO) for the elimination of the bannered route, truncation of U.S. 701 north from Charleston to Georgetown, and the establishment of Business Spur I-526. These requests were all approved by AASHTO on June 15, 1992.

Business Spur I-126 overhead
Business Spur I-126/U.S. 76 (Elmwood Avenue) west combine with U.S. 21-176-321 (Main Street) for five blocks to a directional T interchange with I-126 west and Huger Street south. Photo by Paul Martin (2000).

This span wire based sign was eventually replaced, but as of June 2016, still displays a Business Spur I-126 shield, albeit on a tri-color shield.

The first shield for Business Spur I-526 west in Mount Pleasant, SC.

Business Spur I-526 travels west from South Carolina Highway 703 in the town of Mount Pleasant. 05/27/07

US 17 south ahead of Business Spur I-526 in Mt. Pleasant, SC.

U.S. 17 meets Business Spur I-526 at a parclo interchange with the east end of Interstate 526. 12/31/17

US 17 south at Business Spur I-526.

A loop ramp joins U.S. 17 south with Business Spur I-526 (Chuck Dawley Boulevard) south into Mount Pleasant. 12/31/17


  1. Email correspondence with Paul Martin, November 4, 2000.

Page updated April 12, 2023.