United States Department of Transportation
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Incorporation of Wildlife Crossings Into TxDOT’s Projects and Operations
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2019-06-01
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[PDF-13.62 MB]
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Edition:September 2017–February 2019
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Abstract:Each year close to 8,000 crashes involving wild or domestic animals are reported in Texas. Roughly 20 people die each year on Texas roadways in these crashes, many more sustain injuries, and thousands of animals lose their lives. Reduction of animal-vehicle collisions (AVCs), especially wildlife-vehicle collisions (roughly 70% of the total AVC count), is a TxDOT goal and a key objective of this study. To reduce AVCs, it is important to provide opportunities for wildlife to cross beneath or above roadways via special crossing structures. This project reviewed all options for animal-vehicle conflict mitigation and provides guidance for all DOTs. This report summarizes national and state-level efforts to reduce animal-vehicle conflict, analyzes Texas’s AVC data, explains how to identify AVC hot spots, and provides benefit-cost ratios for various AVC mitigation efforts across the TxDOT highway system. To help ensure wildlife crossing considerations can become routine part of state DOT project development processes, this work also recommends specific language modifications to 18 TxDOT manuals and provides a new manual on wildlife crossing structures. The project findings demonstrate that data-driven, carefully planned, and well-designed wildlife crossing structures can enhance traffic safety significantly, are cost-effective across much of the TxDOT network, and help ensure that TxDOT can play a meaningful role in preserving human and animal lives and property for the benefit of current and future Texans.
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