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Wysokowski A., Janusz L., Staszczuk A. & Bednarek B.
Reducing the negative effect of communication (road and railway) investments on free migration of wildlife.
Abstract: In this paper a general information about the harmful effect of transportation investments connected with free migration of the animals will be presented. A classification of typical passages for animals together with descriptions, both on roads and railroads will be included. Also general rules for designing those pas­sages for animals are published. All these are illustrated with examples of above-mentioned constructions, both traditional and modern. On the base of extensive research carried out at the Research Institute of Roads and Bridges in ŝmigród advantages of different types of passages for animals are published. The paper are finished with concluding remarks about the future design of construction of passages for animal.
Key words: fauna migration, transport infrastructure, barrier effect, technical solution, wildlife passages

Suggested citation: Wysokowski A., Janusz L., Staszczuk A. & Bednarek B. 2007. Reducing the negative effect of communication (road and railway) investments on free migration of wildlife. In: B. Jackowiak (ed.). Influence of Transport Infrastructure on Nature. General Directorate of National Roads and Motorways, p. 201-209. Warszawa-Poznań-Lublin.
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