**4. Conclusions**

In order to overcome technical problems reported in the Chapter "Challenges in the construction of highways in the Brazilian Amazonia environment: Part I: Identification of Engineering Problems", can be employed solutions with materials found in the vicinity, in most cases. Thus, for problems of the absence of stone material at the construction site, the use of natural materials (lateritic concretion), synthetic materials (SCACC), and recycled materials (e.g., from ceramic waste and milled RAP) can be used, while for problems of the natural foundations of roads with low bearing capacity can be used partially or fully replacement of natural soil for a layer composed of coarse crushed stone (*rachão*) and clean sand, or, for greater depths, it can be used reinforced piled embankment (fill supported on piles and reinforced by geogrids).

Although the Brazilian Amazonia brings some hindrances to the construction of highways in the *várzea* regions, nevertheless in the elevated regions (*terra firme*), lateritic concretions can be counted on for use in base and primary courses, and there are lateritic soils of better quality for the construction of embankments, in addition to the favorable conditions of slope stability, especially in periods of drought rain, induced by soil suction.

For rural roads with low traffic volume, ceramic waste can also be used as recycled material in primary coatings.
