Punctuality and the energy efficiency are the most significant criteria of immediate activity of every transport system. The problem of improving these characteristics is unfolded in this paper. The task of optimization the punctuality and energy efficiency is solved by adjusting departure headways and running times. Methodology of schedule parameters search is based on the statistical analysis of historical data. The study reveals a number of regularities that are characterizing the freight train flow at the main railway line. First of all, we note the important dependences between the punctuality characteristics and the chain position of the train.
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