Justification of a rational option of development of the highspeed railway according to technical, technological and economic criteria

Abstract

When a new high-speed railway is designed on the routes with the existing mixed(freight and passenger) traffic, part of the trains can be relocated from the existing railway to thenew one. This will have an additional effect of the increasing current capacity of the existing railway. A method is proposed for justification of a rational option for the development of a high-speedrail on the basis of technical, technological and economic criteria. It is proposed to solve the problemof determining the rational option for the development of a high-speed railway as the problem ofoptimal distribution of resources among the components of the railway, taking into account technical,technological and economic criteria. The result is a set of solutions consisting of options for thedevelopment of each component of the railway, which will provide the maximum systemic effect forthe railway as a whole. Each jth option of the development of the ith component of a high-speed railwaycan be described by three main indicators: the travel time of a high-speed train; capital investmentsrequired to implement this option; and the available traffic capacity of the component. Depending onthe problem being solved, each of the listed parameters can act both as a criterion and as a limitation.Depending on the purposes of the design, it is proposed to consider the problem of determiningthe rational option for the railway development either in the direct or inverse setting. In the first case,the systemic effect is expressed by an objective function that minimizes the amount of necessarycapital investments in the railway infrastructure while ensuring the stipulated travel time of a highspeed train. In the second case, the purpose is to minimize the travel time of the train withoutexceeding the specified amount of capital investment in the development of all components of therailway.The results obtained can be used to justify decisions on the use of single-track components andto determine the rational configuration of single-track lines when high-speed traffic is organized.