Rinker Design Associates, P.C. (RDA) is providing professional engineering services serving as the lead designer to deliver the I-66/Route 15 Interchange Reconstruction Design-Build for VDOT (Northern Virginia District). This $59M Design-Build Project will reconstruct the I-66/Route 15 Interchange to relieve congestion, enhance public safety, operations and capacity, and accommodate forecasted traffic demand in the project area. RDA is designing the reconstructed interchange as a diverging diamond interchange (DDI), the third of its kind in the Commonwealth of Virginia, to best accommodate the projected traffic volumes, as well as critical pedestrian movements in the interchange area. The selection of the DDI alternative was the result of extensive analysis by RDA to find an interchange design that would best accommodate traffic demand, reduce the project footprint and environmental impacts, improve constructability and shorten overall construction duration when compared with previously considered alternatives, and reduce overall project cost. As the Lead Designer for the project, RDA’s responsibilities include:

• Overall Project Design Management & QA/QC
• Public Involvement
• Interchange/Roadway Design
• Utility Relocation Coordination & Design
• Right of Way Acquisition Services
• Transportation Management Plan Design
• Signage & Marking Plan Design
• Drainage Design (Stormwater Management & BMP Design, Erosion Control Plans, Local Drainage Design, Culvert Design, Outfall Analysis)
• Subconsultant Oversight & Management (Structural Design, Environmental Permitting & NEPA Document Update, Traffic Analysis & IMR Update, Signal Design)