TBS is serving as the prime consultant for LADOTD on this interstate widening project which consists of approximately four miles of interstate widening to the median side in St. Tammany Parish, LA. Upon completion, the project will include three lanes in both the westbound and eastbound directions. The interstate segment will include concrete median barrier and cable barriers in forested median areas. The project also includes the widening and rehabilitation of eight bridge sites ranging in structure type from reinforced concrete slab spans to AASHTO Type III prestressed girders and steel plate girders. TBS performed roadway design, including widening and reconstruction; design of bridge widening for the Pontchitalawa Creek and Tammany Trace bridges; environmental support; level 4 traffic management plans; and associated tasks.