No abstract

No abstract

An integrated approach to node and station operation analysis is possible by means of analytical methods, customized to this scope. Alternatively, the simulation models allow more in-depth analyses aiming at the optimization of the use of capacity. The general goals of the research are the comparison of methods for the assessment of railway lines and nodes’ capacity, suitability for specific tasks, and stability of the results under variable scenarios. The comparison is finalised to quantify the relative level of confidence of the concerned literature methods. The work is part of a larger research project with the final goal of identifying the most appropriate approach for the optimization of the network capacity and the setup of specific guidelines. In this framework and perspective, the paper introduces synthetically the methods and applies them systematically to a real complex mixed-traffic network in Trieste, situated in Northeast Italy, including the main passengers and freight stations and a set of lines used for both services.

comparative application of methods for the combined lines-nodes capacity assessment atieh kianinejadoshah & stefano ricci sapienza University of rome, italy abstract nowadays, a considerable percentage of trains mature delays due to nodes and stations congestion. they are normally a combination of effects of routes conflicts in stations on lines and propagation in stations of delays suffered along the lines. it is a consequence of the variable values of capacity within the railway system caused by a combination of parameters, more relevant when short line sections separate nearby stations. Goal of the research is to compare some literature methods for the assessment of nodes and lines capacity to identify their reciprocal effects and innovative approaches. the work is included in a research framework with the final goal of traffic optimization and minimization of delays. in order to tackle the purpose, the paper introduces synthetically the methods and applies them systematically to a complex text network, including single and double track lines and various typologies of stations. the results of the methods applications are compared each other and with the outputs of a simulation approach. this analysis highlights the most appropriate application fields of single methods and the need of their integration and combination in terms of inputs, intermediate and final results. the review of single and coordinated use of these methods will move towards the definition of a comprehensive new methodological approach for combined lines-nodes capacity calculation. it will represent a powerful instrument to facilitate decision making on operational and infrastructural improvements of complex railway networks.

No abstract