Resumen
The article addresses a solution based on an empirical example proposed for planning of transport system elements through application of a sufficiently extensive trip planner. The tool described, i.e. GTPlanner, developed under implementation of the international program of ERANET Transport III, was provided with an additional feature allowing for the queries submitted by travelling persons to be archived and individual needs of travellers to be profiled within selected areas. The added value connected with the foregoing is also that the problem of transport system planning was perceived from a different perspective, assuming that actual preferences of travelling persons (rather than those imposed by the existing system) should provide the grounds for establishing orientations in terms of organizational and technical changes to be introduced into the transport system of the chosen territory. Besides the information function, GTPlanner also performs an educational role, as it highlights the impact of individual travelling modes on the environment, consequently fostering desirable travel behaviors.