Riggs Road and South Dakota Avenue Intersection | Volkert Location: Washington, DC Client: District Department of Transportation (DDOT) The old intersection of Riggs Road and South Dakota Avenue was a semi-rural ramp system featuring multiple dangerous conditions for both vehicular and pedestrian traffic. The client’s design goal was to improve traffic flow and reduce accidents while enhancing pedestrian/bicycle activity and safety. Volkert conducted alternative studies involving traffic and utility data collection including pedestrian and vehicular turning movements, traffic forecasting, Synchro modeling to evaluate multiple scenarios, and three intersection design alternatives. To create a more efficient and pedestrian-friendly intersection, the four-legged signalized intersection design

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