I-85/385 Interchange Improvements
October 2014 - October 2020
Joint venture team Flatiron-Zachry will design and construct a $231 million design-build project for the South Carolina Department of Transportation (SCDOT) that will reconfigure the interchange at I-85 and I-385, improving traffic operations and safety for about 194,000 vehicles per day. Construction began in late fall 2015 and is scheduled for completion in 2020.
The project will replace existing loop ramps with direct-connect, high-level flyover bridges and includes construction of a new collector-distributor roadway along Interstates 85 and 385. The project also includes reconfiguration and replacement of existing ramps, construction of additional lanes along I-85 and I-385, resurfacing and rehabilitation of I-85. Crews will construct 12 new bridges, rehabilitate two existing bridges and construct mechanically stabilized earth (MSE) retaining walls. The project will also require extensive attention to traffic maintenance to minimize impact on the traveling public.
The new interchange will relieve congestion and increase safety on the third busiest interchange in South Carolina. The project is the state’s largest transportation infrastructure project in over a decade.