Wolverton, together with our design-build partner RB Baker, designed and constructed the Diverging Diamond Interchange at I-95 and SR 21 in Chatham County. This was the first DDI in Georgia that went under an interstate, rather than over.
The team was responsible for the development of construction plans for this design-build project let by GDOT which included roadway, signal design and timing, lighting design, geotechnical investigations and utility coordination, in addition to all of the required design-build requirements by GDOT. Special attention was given to utilize existing infrastructure which minimized asphalt, concrete, utility and drainage costs to the contractor and GDOT. This project also included approximately one mile of widening of SR 21, including maintaining access to properties near the interchange.
The project was staged to minimize closure times to SR 21 to one weekend, in which final paving occured during the DDI crossover. The project opened to traffic in early 2017.