**2. Methodology**

This study fundamentally addresses the general characterization of natural, technical, economic, and environmental problems for road construction in the Amazon environment, pointing out possible solutions to circumvent these difficulties. The characterization was performed by reviewing the available technical literature, while the solutions were indicated by case studies of works conducted in the region.

It should be noted, however, that while there is a long tradition of environmental studies in the Amazon, involving biotic and abiotic environments, and the environmental impacts resulting from anthropic actions, the same tradition does not apply to studies of road constructions, from the point of view of Engineering.

The main cause of this problem is the low rate of research data publication and its application on highways in the specialized technical literature.

Thus, although the application of a certain material or technique in each construction of a highway is known, it is difficult to make a deeper analysis, due to the absence of published data.

For this reason, the literature review and case studies discussed here were mostly restricted to academic research of master and doctoral thesis, presenting the results of field monitoring reported by their respective authors.
