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Analysis of the Transport Factor in the Calculation of Durability of Road Pavements

The paper considers the documents of technical regulation in terms of designing flexible road pavements, which were put into effect in 2021. The current approach to the design of flexible pavements was reviewed, and attention was paid to the consideration of special properties of non-cohesive granular materials when calculating the strength of the structure. In the analysis of these documents the experience of using the data received from the WIM (Weigh-in-motion) has been taken into account. The article presents graphs of the percentage distribution of vehicle axle loads in the flow, obtained by processing and averaging data from more than 20 automatic weighing stations in traffic. Proposals have also been made to assess the effect of the magnitude of the total number of design load applications to the pavement surface on changes in the properties of the materials used in the non-rigid pavement layers. These suggestions can be implemented both in case of theoretical approach and empirical approach. The authors have also offered the direction of the development of the existing design method in terms of the use of data on the freight traffic flow in the calculation of multilayered road pavement.