I-77/Tyvola Road Interchange
Charlotte, NC

The busy I-77/Tyvola Road interchange serves as a primary access road to the Charlotte Coliseum and the Charlotte Douglas International Airport. The section is also vital in carrying interstate traffic through Charlotte.

Mulkey faced some daunting challenges in designing the interchange. First, the firm had to accommodate the estimated 100,000 vehicles that would traverse the area daily during construction. Second, tight right-of-way constraints had to be reconciled. And finally, the firm had to meet an aggressive schedule. The firm completed its preliminary plans 70 days ahead of schedule and final plans on the client’s required date. Traffic control and construction staging methods enabled traffic to flow efficiently during construction. And final construction estimates showed that the project was completed within 0.3 percent of the initial bid, reflecting the accuracy of Mulkey’s plans.

Mulkey received the 2000 Honors Award for Engineering Excellence in Transportation from the Consulting Engineers Council of North Carolina for its design of the interchange.