Design and construction of six separate interchange and intersection improvements under a single design-build contract. Project’s improvements include: (1) I-64 and US 250 (Exit 124) Diverging Diamond Interchange; (2) I-64 and US 29 (Exit 118) Interchange Reconfiguration; (3) US 29 NB to Fontaine Avenue Exit Ramp Widening; (4) US 250 and Route 151 Roundabout; (5) Routes 20/649 Roundabout; and (6) a new Rio Mills Road to Berkmar Drive connector road. The US 250 and Route 151 roundabout included the replacement of an existing two-cell box culvert with a four-cell 12’x6’ VDOT standard pre-cast box culvert on a spread foundation to convey Stockton Creek under Route 151.