United States Department of Transportation
i
West-Wide Study To Identify Important Highway Locations for Wildlife Crossings
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2023-06-02
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[PDF-20.28 MB]
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Edition:Final Report
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Abstract:Wildlife-vehicle collisions (WVCs), reduced ecological connectivity, and associated impacts to wildlife and humans are widespread problems across road networks, but mitigation measures like wildlife crossings1 that can address those problems are often considered expensive. This effort aims to support transportation agencies, wildlife agencies and other decision-makers by identifying important road segments where cost-effective wildlife crossings can be deployed to address motorist safety, ecological connectivity and other conservation values across the eleven U.S. western conterminous states of Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming. Most studies identify “hotspots” for highway mitigation locations based solely on the highest rates of wildlife-vehicle collision (WVC) risk and have looked at different scales such as by state, county, tribal reservation, or an individual highway section. This study evaluates WVCs and incorporates ecological and economic values. It is one of the first to look at all western states with a consistent methodological approach and to incorporate collision risk, economic cost, and connectivity considerations to identify the sections of highway across the West that are best served by future wildlife crossings.
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