The Pennsylvania Department of Transportation (PennDOT) selected STV to provide a range of environmental, engineering, and construction-related services for the $880 million reconfiguration, rehabilitation, and reconstruction of the Betsy Ross Interchange along I-95 in Philadelphia. This long-term project will ease congestion for Philadelphia residents and visitors.  The firm is providing preliminary engineering for each of the construction phases, including field surveys; right-of-way, drainage, and erosion and sedimentation control plans; pavement, highway lighting, and signage design; hydrologic and hydraulic studies; geotechnical investigations; utility coordination; public involvement programs; and a Categorical Exclusion Evaluation study.