Wolves and Car Accidents

How Wolf Reintroduction Prevents 120+ Injuries and Saves $10.9 Million Annually in Wisconsin

As Colorado embarks on the journey of reintroducing wolves into its wild landscapes, there’s much we can learn from states that have already walked this path. Wisconsin’s experience with wolf reintroduction offers a powerful example of how restoring apex predators can lead to unexpected and far-reaching benefits, particularly in reducing wildlife-vehicle collisions (WVCs).

As we look toward the future, it’s worth considering how wolves could similarly transform Colorado’s ecosystems, public safety, and economy in ways that might not be immediately obvious.

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Wisconsin’s Experience: Wolves as Unlikely Traffic Safety Allies

In the late 20th century, gray wolves began to naturally recolonize parts of Wisconsin after being nearly eradicated in the 1960s. As these apex predators returned, ecologists and economists alike began to notice something remarkable: the presence of wolves was linked to a significant reduction in deer-vehicle collisions (DVCs). Deer, whose populations had surged to problematic levels across the state, posed a serious risk to motorists, leading to thousands of collisions annually.

Wolves helped mitigate this issue in two primary ways. First, by preying on deer, they naturally reduced the overall deer population. Second, and perhaps more importantly, wolves altered deer behavior. The presence of wolves created a “landscape of fear” that changed where and how deer moved, leading them to avoid roads and other areas where collisions were most likely to occur. According to a 2021 study, this combination of factors led to a 23.7% reduction in DVCs in Wisconsin, translating to fewer injuries, lives saved, and substantial economic savings.

A graph from the study illustrates the density of deer and wolves, as well as accident rates in counties with wolves versus those without. It shows a significant change after wolf reintroduction around 1990.
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The Numbers: Economic and Safety Impacts

The reduction in DVCs due to wolves brought about an average of 38 fewer collisions per county each year, saving Wisconsin approximately $10.9 million annually.

This significant economic benefit, alongside the improvement in public safety, far outweighed the costs associated with wolf-related damages, such as livestock predation. In fact, the financial benefits of reduced collisions outpaced the costs by a ratio of 63:1.

Lessons for Colorado: The Potential Benefits of Wolf Reintroduction

Colorado, like Wisconsin, struggles with a high number of wildlife-vehicle collisions. Official reports suggest around 4,000 such incidents annually, though estimates considering unreported cases push this number closer to 14,000. These collisions cost the state approximately $80 million each year, factoring in property damage, emergency response, medical fees, and other associated costs.

The insurance industry alone pays out nearly $1.1 billion annually in claims for wildlife-vehicle collisions across the United States. A significant portion of these claims comes during the fall, particularly in November, when collisions spike. As Carole Walker, Executive Director of the Rocky Mountain Insurance Information Association, notes, “The average property damage cost of animal-vehicle collisions is estimated at $3,103, up 1.7 percent from a year ago.”

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CDOT Wildlife Data
Data from CDOT shows the number of wildlife-vehicle collisions in Colorado. More than 45 people have died and 4,400 injured in these accidents since 2010. The vast majority are deer accidents, like Wisconsin.

Drawing from Wisconsin’s experience, Colorado could potentially see a similar reduction in WVCs if wolves are reintroduced into areas with high deer populations and frequent collisions. If Colorado were to achieve a 23.7% reduction in reported WVCs, that could mean approximately 950 fewer incidents annually—or up to 3,300 fewer collisions when considering higher estimates. Such a reduction would not only save lives and prevent injuries but could also save the state tens of millions of dollars each year.

Beyond the direct impact on deer populations and WVCs, the reintroduction of wolves could bring broader ecological benefits. Just as in Wisconsin, wolves could help regulate deer populations, promoting healthier forests and reducing overgrazing. Additionally, the behavioral changes wolves induce in deer could lead to less crop damage and a reduction in the spread of diseases like Lyme disease, which is transmitted through deer ticks.

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Understanding the Broader Impact of Wildlife on Our Lives

Wisconsin’s experience highlights an often-overlooked truth: wildlife plays a profound role in our daily lives, affecting everything from road safety to public health and the economy. While the idea that wolves could make our roads safer might seem surprising, it’s a testament to the interconnectedness of natural systems. By reintroducing wolves, we’re not just restoring a species—we’re also rebalancing our ecosystems in ways that can have significant, tangible benefits for human communities.

As Colorado moves forward with its wolf reintroduction plans, it’s worth considering the full scope of potential benefits. Wisconsin’s example shows us that the impact of reintroducing an apex predator can ripple out in unexpected and far-reaching ways, improving public safety, boosting the economy, and enhancing the health of our natural landscapes.

Preview of the Complete Colorado 14ers Planner spreadsheet showing all 58 peaks with route details, difficulty, mileage, and prep information

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Every peak. Every trailhead. Every detail: in one spreadsheet.

  • All 58 peaks ranked beginner to expert
  • Safety notes and seasonal windows for each
  • Route difficulty, mileage, and prep tips
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Conclusion

The lessons from Wisconsin offer a compelling case for the reintroduction of wolves in Colorado. While the primary goal may be ecological restoration, the potential benefits extend far beyond the wilderness. By reducing wildlife-vehicle collisions, saving lives, and cutting costs, wolves could become valuable allies in creating a safer and more balanced environment. As we look to the future, it’s clear that the impact of wildlife on our lives is deeper and more significant than we might have ever imagined.

Alex Derr, Founder of The Next Summit

Alex Derr is an Eagle Scout, climber, and environmental policy expert located in Denver, Colorado. He created The Next Summit to help others stay safe exploring the mountains and advocate to preserve the peaks for the future. Follow him on Linkedin or Twitter or click here to contact him.

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