Anpassning av vägmiljö och vegetation som åtgärd mot viltolyckor

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Annika Jägerbrand

Wildlife accidents are a global problem that causes human fatalities as well as physical and economic damage. Current preventive measures do not seem sufficient enough to achieve a reduction in wildlife accidents. The road environment may be modified so as to reduce the attractiveness of resources in the road area. Modifications may be directed towards the maintenance (e.g. adjustment of mowing practices) or the structure or composition of the vegetation. This report presents an overview of the current knowledge about how the road area, and to some extent also the adjacent areas, can be made less attractive to wildlife through road environment and vegetation changes. The report deals with relationships between wildlife presence/wildlife accidents and the surrounding environment as well as road operation and maintenance. Studies of wildlife collisions and the surrounding environment reveal complex relationships between wildlife collisions and landscape features (e.g. forest or open landscape), species and/or habitat diversity. How crucial these characteristics are for wildlife collisions largely depends on which game animals are studied. Mowing and clear-cutting activities, as well as adjacent land use may influence the roadside attraction for wildlife, sometimes in unknown ways. The list of plants that should be unattractive to grazing should be evaluated and developed further.

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