Part of the $2.1 billion Downtown/Midtown Tunnel P3 project, the Martin Luther King Expressway extension is an elevated roadway that provides a limited-access north-south route through Portsmouth, This P3/design-build project reduces truck and commuter traffic on the neighborhood streets and improve the operations of the regional traffic network. Close coordination with the project development team created efficiencies and time-saving construction methods.
Volkert managed the engineering and design of the Martin Luther King Expressway extension, a $207-million, 1-mile, 4-lane, elevated, limited-access, urban principal arterial that includes an all-electronic open-road tolling system. The project included designs of two new urban interchanges, an interchange modification, 2 bridge widenings, the widening of I-264 to add auxiliary lanes, side road improvements, and new stormwater management facilities.
Significant cost savings were achieved by using cost-effective materials such as a fiberglass reinforced plastic desk drainage system, which reduces the amount and size of equipment required for construction. With an extremely fast-track schedule, the project progressed from 30% roadway plans to 100% drawings in a one-year time period.
The context-sensitive design used for this project minimizes impacts to historic resources; maintains connectivity of neighborhoods with pedestrian-friendly amenities; incorporates streetscape enhancements and an urban plaza to serve as a gateway into the historic district; incorporates aesthetic treatments on and under the bridges; and turns stormwater management ponds into attractive water features.
Scope of Work: Civil, Structural, Traffic, and Hydraulic Engineering, Landscape Architecture, BMP Stormwater Management, Fast-Track Design, Complex TMP