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The paper deals with the dynamic analysis of wagon with a low and multifunctional loading plane for freight railway transport. The main task of simulation was to verify enough overlap of buffers, when the vehicle rides along an S-shaped curve, because the wagon is equipped with non-standard construction of the front part of undercarriage. Analyse was performed in program VI-Rail. Dynamic simulation analysis demonstrated, that the set of wagons can rides without lockdown of buffers, because it was adhered minimum buffers overlap.