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The Trust Project

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(Provided by Gigafact.)

Yes.

Studies show that wildlife crossings can decrease animal-vehicle collisions by roughly 90%, making highways safer for people and animals. Dramatic reductions in crashes have been reported in Colorado, Wyoming, Florida and Canada, among other locations that use wildlife crossings.  

Aside from the dangers animals face from vehicle traffic, highways fragment their habitat, inhibit migration and decrease the genetic diversity required for adapting to changing conditions. Animals of all sizes, from moose to coyotes to otters, use Colorado’s wildlife crossings. 

The state has hundreds of crossing structures, including overpasses, underpasses, bridges and culverts. 

Colorado law enforcement receives an estimated 5,000 reports of wildlife collisions per year, representing up to $80 million in response costs, medical expenses and value of wildlife lost annually. An uptick of collisions happens during peak animal migration season in the fall, especially during dawn and dusk. 

See full source list below.

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References:

Wildlife overpass structure size, distribution, effectiveness, and adherence to expert design recommendations, National Center for Biotechnology Information, Dec. 12, 2022. Source link.

Cost-Benefit Analyses of Mitigation Measures Aimed at Reducing Collisions with Large Ungulates in the United States and Canada: a Decision Support Tool, Ecology and Society, December 2009. Source link.

Colorado is becoming a leader in construction wildlife crossings – and there’s much more to come, Denver7, Sep. 4, 2024. Source link.

How Do Animals Safely Cross a Highway? Take a Look., New York Times, May 31, 2021. Source link.

How Does Habitat Fragmentation Affect Genetic Diversity?, Sustainability Directory, April 3, 2025. Source link.

CDOT celebrates delivery of first major wildlife crossing on the I-70 Mountain Corridor near Genesee, Colorado Department of Transportation, Jun. 13, 2024. Source link.

Wildlife on the Roadways, Colorado Parks & Wildlife, accessed in June 2025. Source link.

Type of Story: Fact-Check

Checks a specific statement or set of statements asserted as fact.

Por recently graduated from CU Boulder with a master’s degree in journalism and is interested in writing about the environment and exploring local stories. When not working on some form of writing, Por is either looking for Thai food or petting...