SYSTEM ANALYSIS FOR MANAGING TRANSPORT NETWORK IN CASE OF EMERGENCY SITUATIONS
In the article from the position of the system analysis the existing methods of structural-parametric synthesis, mathematical modeling, optimal control of transport networks are investigated, the goals of ensuring the safety of the transport infrastructure with the positions of the optimal load of the transport network, especially in case of emergency situations, the requirements for the development of a mathematical model of the load of the transport network are determined. A large number of studies on the load of the transport network was carried out in the environment of intelligent transport geographic information system “ITSGIS” and was aimed at the development of algorithms for automatic detection of emergency situations and congestion. At the same time, various types of hardware such as sensors, cameras and radars were used in the intelligent transport geographic information system to collect the characteristics of traffic flows. When solving the problem of carrying out a system analysis of the load management of the transport network in the event of emergency situations and building a model of emergency situations, the decomposition of the subject area “Loading of the transport network” into classes of objects, the model of the subject area is developed; the models of transport infrastructure objects included in the subject area are developed, the attribute characteristics of objects are revealed; performed parameterization of the emergency situation, the classification of contingencies according to the types identified temporal characteristics and geofences direct impact on the transport network and the indirect impact on traffic flows. Model contingencies defined classes: Type, Time, Reasonablely. The type of emergency situation is characterized by its location, i.e. its coordinates on the electronic map, or the cause. Time of emergency is considered from various positions, such as time of occurrence, normative and actual time of elimination. Geofences of influence of an emergency situation are divided into zones of direct and indirect influence of an emergency situation on transport processes and objects of transport infrastructure. On the basis of the constructed models developed methods of management of loading of the transport network and analysis of emergency situations, including the collection and processing of raw data, the determination of emergency situations and their characteristics, the choice of the optimal response strategy, the performance of management functions.