Resumen
Development of industrial zones, districts and entire regions largely depends on the solution to the problem of the formation of the rational structure of territorial transport systems and their effective development. Peculiarities of the functioning of territorial transport systems are closely related to their structure which is characterized by some combination of pair proximity indexes. The functioning of such systems is closely linked with their structure. The structure of any transport system is multilevel. To clarify the number of structural levels of the system and their constituent elements, criteria and algorithms have been developed to determine the relative position of the sets in a plane taking into account their possible overlap. A generalized index of the proximity of several non-overlapping sets was developed based on the account of pair indexes of the proximity of individual sets and equal to their mean square value. The procedure of structural analysis of the transport system is connected with the necessity of preliminary determination of its structural index according to the results of calculations of values of pair proximity indexes. A method of establishing the number of structural levels of an interregional transport system was developed based on preliminary determination of the structural index of the system with subsequent decision-making on joining the overlapping sets if any. Practical problems related to the refinement of the structure, composition and modes of operation of transport systems should be solved on the basis of the predefined structural index. The study results make it possible to structure transport systems with singling out individual levels and differentiate costs for the development and operation of systems in order to optimize their properties