This thesis discusses and responds to the structural issues and reinforcement requirements of the SR.15 highway overpass, a mixed steel-concrete bridge located over the A4 Torino-Trieste Highway in Italy.The bridge was constructed between 2000 and 2003 and is 108 m long with a trapezoidal steel box girder and a reinforced concrete deck slab. The current setup is substandard for the current load demand, and it lacks adequate load-carrying members, construction distortions, support constraints, joint degradation, and corrosion. The first part of this discussion describes the bridge and its construction materials and parts including the box girder, concrete deck and support piers.