At the present time it is built in Cartagena-Colombia, a perimetral road bordering La Virgin's Marsh, where the subsoil is shaped for deposits of silty organic clays of very low shearing resistance and high compressibility, which it makes difficult the implantation of some structure on them. The conformation of road required the construction of embankments of confining and filling among themselves with material of dredging of the marsh's bottom. In order to explain the large deformations and crackings of the trial embankments constructed initially, were modeled by finite elements each join of stages of constructive process determining pressures of pores, stress and deformations to establish the interaction among the embankments, the filling and the ground foundation. By means of the information of settlement's plates installed at the trial embankments and theoretic behaviour models for soft soils, were determined the deformations generated by consolidation of the subsoil deposits with the aim to evaluate the stability and functionality of long-term road themselves. Finally, the results of different models used on are compared and then sensitivity analysis of them are taking to account some possible variations in the resistance properties of the ground foundation. The effect of seismic movements was determined starting from two-dimensional methods of propagation of wave (program QUAD4M), to evaluate the cutting stress and deformations induced by the seism at the soft soils of the foundation and the embankments and fill of project. Recommendations to avoid the cracking of the embankments and to guarantee the stability and functionality of the road. The measured suggested include the improvement of the subsoil by preload and vertical drains, the reinforcing of the embankment with geosintetics and the drainage of the fill with sinks of gravel.