Truck fleet structure optimization for main gas pipelines servicing

Based on proven statistical data, the experience of operating gas-powered vehicles was analyzed using the example of gas-diesel modifications of KAMAZ truck tractors, taking into account actual reliability, design features of the fuel system, and load capacity. The analysis of the cargo transportation tasks frequency was conducted based on waybills and approved schedules for construction and installation work for the maintenance of gas transportation infrastructure facilities. It also included an assessment of maintenance costs and formalization of criteria for optimizing transport routes. During the comparative analysis of tractor trucks with conventional and gas-powered engines, new patterns of transportation cost formation were established and a multi-criteria efficiency assessment system was developed. This system takes into account economic, operational, and logistical parameters. For practical application of the obtained results, a mixed-effects model with a single-step function was proposed. The use of this model makes it possible to reduce the transportation costs by 18% by increasing the fleet utilization rate and optimizing logistics routes for cargo delivery at the facilities of the gas transmission system.