Szukana fraza: [Abstrakt = "Crossing the street is the most risky action for pedestrians. Because of significant pedestrian traffic in the cities, its organization, besides ensuring the best traffic capacity, is one of the most important tasks for roads and streets designer and traffic administrator. A solution that guarantees the highest level of safety and proper road traffic capacity is a footbridge or an underpass, but they are the most expensive solutions at the same time, both during the construction stage and in maintenance. Ground traffic organization requires also high financial expenditures, especially in case of larger crossings. In the paper the authors described conditions for a safe pedestrian traffic on singlelevel and two\-level pedestrian crossings. An alternative solution analysis is presented on three examples connected with diffrent aspects of two\-level crossing construction. The examples show how many factors have to be concidered when choosing between ground traffic organization or footbridges and underpasses for pedestrians. Deciding on a priority of one of the factors\: pedestrians convenience, adaptation for the needs of all of the users, road traffic capacity and costs is not simple and should be supported each time with a careful analysis from the very beginning."]

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