# Colorado Wildlife Overpass Reduces Vehicle-Animal Collisions by 91 Percent Strategic infrastructure investment connects 39,000 acres of habitat while significantly improving highway safety. - **Source:** [Environment | The Guardian](https://www.theguardian.com/uk/environment) - **Published:** 2026-10-19 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/6617d8e5-fc7d-4a95-94fa-3918e65f6969 ## Infrastructure Impact Analysis The wildlife overpass on Interstate 25 between Denver and Colorado Springs has achieved a 91% reduction in vehicle-animal collisions within its first 10 months. This structure serves as a critical bridge over a busy highway, effectively connecting 39,000 acres of fragmented habitat that previously posed significant risks to both local wildlife and human commuters. ## System Design Specifications Spanning six lanes of traffic, the overpass measures 200 feet wide and 209 feet long. The design features grass-covered surfaces and gradually sloped entrances to encourage natural movement. Beyond the main bridge, the system integrates eight-foot-tall fencing and five large underpasses to channel animals safely away from high-speed traffic zones. ## Economic Project Efficiency The project was initially allocated $22 million in federal funding alongside $8 million from state resources. Remarkably, the Colorado Department of Transportation completed the construction for a total cost of $15 million. This significant budget surplus demonstrates high operational efficiency in executing large-scale infrastructure projects while meeting all environmental and safety objectives. ## Behavioral Adaptation Observations Wildlife biologists have documented diverse species utilizing the crossing, including elk, bears, pronghorn, and northern leopard frogs. Observations confirm that large game, such as bull elk, prefer these open structures over tunnels. The design allows animals to maintain visibility for miles, which is essential for their natural movement patterns and overall comfort during crossings. ## Historical Habitat Connectivity For decades, pronghorn populations migrating between Trinidad and Greenland were blocked by the I-25 corridor. The new overpass has successfully restored this historical movement, with video evidence confirming pronghorn using the bridge to access the west side. This restoration of migratory paths is a major milestone for regional biodiversity and ecological health. ## Safety and Cost Mitigation Prior to the installation of this system, the corridor averaged one wildlife-vehicle crash every single day. Research indicates that such infrastructure investments often pay for themselves by preventing these costly accidents. By nearly eliminating these collisions, the state reduces emergency response requirements, vehicle repair expenses, and the tragic loss of human and animal life. ## Diverse Species Utilization While the overpass was designed primarily for large game, it supports a wide range of local fauna. Officials have tracked smaller animals, including mule deer, coyotes, rabbits, and the threatened Preble’s meadow jumping mouse, utilizing the corridor. This broad utility highlights the effectiveness of the structure in supporting a complex, multi-species ecosystem. ## Future Infrastructure Scaling With nearly 20 wildlife crossings currently under development across the United States, the Colorado project stands as the largest of its kind. Given the success of this initiative, the Colorado Department of Transportation is actively planning to expand the network of wildlife crossings throughout the state to further enhance safety and habitat connectivity. ## Sources covering this story - https://www.theguardian.com/us-news/2026/oct/19/colorado-wildlife-overpass-vehicle-animal-collisions-results — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._