Features of determining capacity on double-way lines when passing high-speed passenger trains

Abstract

Development of proposals for adapting the existing methodology for calculating the available throughput to the operating conditions of the railways of Uzbekistan, taking into account the factors that ensure traffic safety when passing high-speed passenger trains. Methods: Grapho-analytical approaches and a comparative analysis method were used to determine the throughput of railway lines with mixed train traffic. Results: The main factors influencing the capacity of lines, advantages and disadvantages for each existing method for determining the capacity of railway lines are given. To assess the quality of transportation processes on railway lines, experimental train schedules were constructed. Based on the analysis of their indicators, a formula was proposed for calculating the throughput on double-track lines when passing high-speed passenger trains. Practical significance: The application of the proposed methodology improves the calculations of the performance indicators of sections with an unparalleled train schedule.

Study of specific aspects of calculating the throughput of freight trains on two-track railway sections with mixed traffiс

“…Based on methodological recommendations [1] and scientific research [2,3,14], the estimated capabilities of freight trains and their maximum number are expressed as follows: In the above expressions, it is necessary to take into account the order of placing highspeed passenger trains in the schedule of trains available in the Joint Stock Company "Uzbekistan Railways". In particular, taking into account that the movement of high-speed passenger trains is partially carried out in a packet method, the coefficient of displacement of freight trains from the graph is described in scientific research [4,16,19] as follows:…”

“…If the time interval between high-speed passenger trains is less than a given value, freight trains cannot be placed between bursts, and in this schedule, high-speed trains are sent in a partially burst fashion. [4,7,10,11]. The arrival times of successive freight and high-speed passenger trains at the separation points and the downtime when crossing trains are analyzed.…”

Establishing the impact of empty freight trains on the capacity railway lines

“…However, certain factors that influence capacity, such as different types of heavy trains, the construction of third tracks on double-track sections, etc., were not fully considered in these guidelines. Consequently, there is ongoing scientific research aimed at improving the capacity of railway sections on a global scale [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. For instance, in the doctoral dissertation of A.V.…”

The Simulation of APM Operations: A Case Study of Suvarnabhumi Airport

“…In addition, rolling stock information such as tractive force, numbers of engines, braking characteristics influenced train movements and line capacity in this case [19]. In order to increase the line capacity, different schemes can be used, such as reducing the dwell time, rearranging the station locations, adjusting the train speed, or installing additional signaling equipment [11,22]. However, adjusting the dwell time affects passengers directly in terms of service satisfaction and may cause density problems on the station platform if passengers cannot board the train.…”