EN
This article is a consideration on the issue of notions of the transportation network and its spatial structure. Differences between the network as an element of infrastructure and the network in the functional sense (e .g. network of public transportation lines) are discussed. Also possibilities are studied as to joint or separate studying of transportation in a given area, including also R. Domański's concept of units of public transportation networks. The author makes a review of various approaches to the issue of relations between the network and transportation system, being of the opinion that the system is superiour to the network. Treatment of the network in system categories results i describing its structure as distribution of elements of the network and interrelations occuring between them. The inteirrelations are of two kinds: formal and functional. Formal interrelations mean primarily distances and locations, and functional mean traffic and transported items. The article contains a review of methods to study individual elements of the network and interrelations between them. An important role here is played by graph methods though the topological approach despite its advantages also forces certain interpretation limitations. Painting to advantages of the system approach, and primarily to its stress on functional interrelations, the author states that it makes a basis for a multi-aspect analysis of the network, fuller than in traditional approaches.