The present study bill exclusively on the choice of quality road materials case of three road infrastructural projects, namely: the Sangmelima-Bikula, N’joura-Bilala roads and the NGaoundéré cliff. In this experimental study, we make laboratory tests at LABOGENIE. The principal’s results are: Lateritic gravels represent the mostly used soil category in road projects in Cameroon, have outstanding geotechnical and mechanical characteristics in most cases, that is why it is widely used as forming layer and foundation layer. However, these types of soil do not generally have the necessary characteristics to be used as underlying layer: it is therefore necessary to improve them or stabilize them with LHR or to resort to Tar Gravel; Concerning surface layers made of bituminous concrete, in addition to the fact that the formulation phase in laboratory must be validated for all levels of studies carried out, it is also primordial to choose the final formulation on the basis of economic and weather conditions of use.
