Business Spur I-526 - Mount Pleasant

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.