Source-headline guide · 12 cited facts · 1 source hosts
Single source: theguardian.com — not independently corroborated.
Colorado wildlife overpass cut vehicle-animal collisions by 91%, report finds
Answer and evidence scope
- Answer
- A newly released report says a Colorado wildlife overpass over Interstate 25 has cut wildlife-vehicle collisions by 91% in the 10 months since it was completed, with elk, bears, pronghorn and frogs tracked using the crossing. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]
- Significance
- The listed evidence does not establish broader implications.[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]
- Uncertainty
- Source-headline guide · 12 cited facts · 1 source hosts — Source claims do not establish independent corroboration.
What happened
A newly released report finds that a Colorado wildlife overpass spanning a busy stretch of Interstate 25 has cut wildlife-vehicle collisions by 91% since it was completed 10 months ago, the Guardian reports (theguardian. com). The bridge carries elk, bears, pronghorn and even northern leopard frogs across the highway, and officials say it connects 39,000 acres of habitat. Brandon Marette, a wildlife biologist for Colorado Parks and Wildlife, told CBS News that one of his most heartwarming moments came when the Colorado Department of Transportation sent him a picture of an elk mother taking her calf under the interstate. "That elk with her calf was just standing there in safety," he said. [1] [2] [3] [4]
Key facts
The Colorado Department of Transportation said that before the overpass was built, the corridor averaged one wildlife-vehicle crash a day (theguardian. com). The structure is covered in grass and measures 200ft wide and 209ft long, with gradually sloped entrances to ease crossings. Officials have also recorded mule deer, coyotes, rabbits, frogs and the threatened Preble's meadow jumping mouse using the corridor. The project drew $22m in federal funding and $8m from the state, but officials say it was completed for just $15m. Nearly 20 wildlife crossings are underway in the US, with the Colorado structure currently the biggest, and the state transportation department says it hopes to build others across Colorado. [5] [6] [7] [8] [9] [10] [11]
What remains unknown
The report offers no breakdown of collision figures by species, no comparison period beyond the 10 months since completion, and no independent verification of the 91% figure (theguardian. com). It also does not detail how the state will fund the additional crossings it hopes to build, or when those projects might begin. Single source: theguardian. com — not independently corroborated. https://www. theguardian. com/us-news/2026/oct/19/colorado-wildlife-overpass-vehicle-animal-collisions-results [3] [12] [6] [11]
Corrections
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