STUDY OF STABILITY OF TRAIN FLOWS ON HEAVILY USED FREIGHT RAILWAY REGION

Abstract

The article examines the stability of freight trains in different periods of traffic at the landfillof the regional branch of "Odessa Railway" JSC "Ukrzaliznytsia", which is a "bottleneck" of the railway systemwith the largest seaports in Ukraine. It is offered to analyze the consolidated daily operational indicators onthe main routes of train flows: density at the train station (traffic density per 1 km, tons); average daily speedof trains (km / h); the number of freight trains that have passed (train). For a comprehensive analysis ofchanges in operational indicators in the low (I-III quarter) and high season (IV quarter) of traffic summarizedindicators in the sequence of train flows. This allowed us to identify the most influential train stations for thestability of train traffic. Regularities of influence of operational indicators on the general duration ofmovement of train streams are revealed. Based on the correlation analysis, the influence of passenger trafficon the duration of freight trains on differentroutes has been proved numerically. Correlations can be describedas strong and significant. The interaction of changes in operational indicators on different routes of train flowsat the investigated landfill was revealed. Significant impact on the stability of train flows occurs at trainstations, where sorting stations operate. Increasing the share of scheduled departures in 2019 and working toextend the service in 2020 has reduced the gap between the total duration of trains on the routes to acceptablevalues. A cluster diagram of the relationship between the impact of passenger traffic on the duration of freighttrains on different routes, which allows a comprehensive analysis of the interdependence of operationalperformance of sections in terms of changes in traffic intensity and redirection of trains on parallel lines.