The introduction of a new technology for wearing course creates problems with different behaviour of the base course. The thin, flexible rubber layer doesn’t distribute traffic load and stresses as classical thin hot mix asphalt surface layer like SMA for instance. Due to large and local deformation of the poroelastic surface layer and since some failures in previous trials were due to the interlayer bonding [SILVIA project] it is also necessary to check that bonding between asphalt base courses under new rubber layers studied in this project. Larger deformation (in comparison with classical hot mix asphalt layer) in the surface layer can also create larger deformation in the base course hence a reduction of its fatigue life. In this WP, one will elaborate the best road structure with a poroelastic surface by using existing pavement design software.