Poplar Street Bridge Interchange Reconstruction St. Louis, Missouri Innovation meets challenges, maintains traffic flow, improves safety • Design improvements improve capacity and safety in restrictive urban space • Innovative methods minimize traffic disruption • Project is delivered under budget HNTB was selected by the Missouri Department of Transportation to design new directional ramps to replace functionally and structurally obsolete existing structures. Project goals were to improve the geometrics, capacity and safety of the new ramps, minimize traffic disruption during construction and deliver plans in 10 months that result in construction bids under the DOT’s budget. The team evaluated several alternatives, including accelerated bridge construction of the ramp with th

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