Principles and methods for examining terrain for traffic roads. Classifications and categorizations of rock masses. Interaction of soil, road and facilities on a traffic road. Geotechnical surfaces for design, surface zoning according to the degree of stability, geotechnical conditions in soil property improvements. Groundwater and building conditions, drainage and NPV decrease. Facilities on traffic roads and geotechnical foundation conditions. Building technology and earth works. Acceptability of natural materials for road building. Urban geology and traffic roads.