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Ashford Dunwoody Road Diverging Diamond Interchange (Georgia’s first)

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MA/Atlas

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2450 Commerce Avenue Suite 100
Duluth, GA 30096-8910

MA was tasked with the interchange modification report, concept development, environmental document and preliminary design. The project consists of reconstruction of the interchange ramp termini, the demolition and reconstruction of the partial cloverleaf and the conversion of the existing bridge to the left-side through traffic to enable the innovative DDI, all on existing right-of-way. The DDI improves the interchange by removing the left turn from the traffic signals. Instead of stopping and waiting for the left-turn light, drivers cross over to the left side of the road and make free left turns onto the interstate ramps.

In November 2012, MA was awarded the Best Innovative Solution Award and the Grand Design Award by The Georgia Partnership for Transportation Quality for its innovative design of the Ashford Dunwoody diverging diamond interchange in Dunwoody, Georgia. The innovative solution award recognizes innovation and emphasizes new design solutions to engineering problems with broad prospects for future application and the grand award is made for one outstanding project that is judged especially worthy.