Abstract: The present invention relates to a system of short- and medium-spans for bridges and other structures. The bridge superstructure is built mainly from components that are not vulnerable to corrosion. It consists of precast prestressed concrete truss girders and a concrete deck. The girders have top and bottom concrete bulbs (i.e. flanges) connected by precast vertical and diagonal truss members made of corrosion-resistant metallic or non-metallic tubes filled with concrete. The deck can be a cast-in-situ reinforced concrete slab or an assembly of precast concrete panels tied together by longitudinal with or without transverse prestressing tendons. The reinforcement in the slab can be fibre reinforced polymer (FRP) bars and/or corrosion-resistant steel bars. The term corrosion-resistant metal or steel means a product that has delayed corrosion properties.