Northwest Corridor Expressway Location: Atlanta, GA Accura served as key subcontractor for construction engineering and inspection and materials testing on the Georgia Department of Transportation’s (GDOT) P3 Design-Build contact for the Northwest Corridor (NWC) Express Lanes project. Accura provided construction engineering, QA inspections and materials testing on this Design-Build contract for GDOT with federal funding. The project is the largest transportation infrastructure project in the history of GDOT. The NWC project added 29.7 miles of reversible toll lanes along I-75 and I-575 in Cobb and Cherokee Counties, Georgia. There is a total of 39 bridges and more than 80 retaining walls with varying elements. Bridge foundation types include caissons, micro piles, spread footings, pile footings, and pile bents. Several bridges have post tension caps. Superstructures include prestressed concrete beams, continuous curved steel beams, and simple span steel beams; the project used the longest concrete beams ever in GDOT construction. Project required inspection of ATMS and intelligent highway features for monitoring and tolling. Accura provided senior QA inspectors for the multi-year project.