**7. Conclusions and recommendations**

This chapter presents a set of theoretical and experimental research on the choice of development directions and the development of scientifically sound technical solutions to improve the thermal parameters of the bodies of refrigerated wagons and containers for the transportation of perishable traffic in the conditions of the Republic of Uzbekistan.


Thus, as a result of comprehensive studies using analytical calculations and field experiments, it was found that a promising option for thermal body fencing is a technical solution where polyurethane foam and "Corundum" are used as thermal insulation. The minimum value of the heat transfer coefficient from the studied materials was provided by the option of thermal insulation of RZhD-1 (produced by "Regent Baltika"), combining reinforced polyurethane and a honeycomb structure on a paper base. The use of these technical solutions in the fences of the bodies of refrigerated wagons and containers will reduce the heat transfer coefficient to 20% and, accordingly, reduce the thickness of the fence by 20–30%, which will lead to an increase in the internal useful volume of the body, reduce its weight and consumption of materials used, improve the thermal condition of the body. Theoretically and experimentally, the possibility of piecewise continuous recording of vertical and lateral forces from the wheel/rail interaction was achieved by measuring the stresses in two rail sections on a significant part of the sleeper gap.
