We have studied road pavement materials but also the processes of manufacturing and implementation. We agreed to study also recycling activities. It was also decided that we would consider all pavement layers. To obtain this information, Saunier & ass. Carried out bibliographic work (magazines, Internet), met with road construction companies and, at the same time the project partners carried out similar research in their own countries. A first version of this paper was produced so that the partners could read it and add data from their countries. The final version is then composed from those additions.