Construction of the substructure and prestressed concrete superstructure for Bridges 4 and 5 of the Functional Unit 3 on the Bogota-Villavicencio Highway. This highway bridge includes four structures. Bridge 4 which has two segments, one constructed using a post-tensioned cast-in-place segmental balanced-cantilever method, and the other segment constructed using precast U beams; and Bridge 5 which also has two segments, one 180 M long and the other 580 M long, both constructed using a post-tensioned cast-in-place segmental balanced-cantilever method.