As a result of the analysis of the methods of quantitative and qualitative assessment of the degree of risk, the theoretical and probabilistic approach of Professor V.V. Stolyarov was chosen to assess technical and environmental risk, based on the probabilistic nature of the parameters studied, in relation to road facilities.The allocation of risks within functional subsystems makes it possible to more accurately determine the ways of risk management in practice. As a characteristic of the degree of danger of a road section, the total risk is used as a complex indicator that can occur on this section under the combined influence of all road parameters simultaneously. Along with the discussion of the concepts of risk, the concept of guarantee is introduced. The concepts of guarantees and risks are introduced on the basis of a random variable distribution graph using the example of a normal distribution. In addition to the technical component of the risk, its economic component is also considered.