In the state of Colorado, an innovative infrastructure solution is making a difference in wildlife safety and road safety. The Greenland Wildlife Overpass, located in Douglas County between Larkspur and Monument on Interstate 25, is a bridge covered with soil and vegetation, designed to allow animals to cross a six-lane highway without the risk of being hit.
This project aims to reconnect the opposite sides of a habitat that had been divided by traffic. According to the Colorado Department of Transportation (CDOT), this overpass is part of a system that can reduce vehicle and wildlife accidents by up to 90%. Shoshana Lew, director of CDOT, has expressed that the goal is to significantly decrease collisions with animals.
Woodland Wildlife Overpass is presented as the largest wildlife crossing in North America. This ecoduct, which is already operational, facilitates the safe transit of species such as elk, deer, black bears, cougars, and pronghorns. Connecting 39,000 acres, or nearly 158 km² of habitat, the structure blends with the environment thanks to its soil and vegetation cover.
The bridge is impressive not only for its functionality but also for its dimensions: it measures 61 meters wide by 64 meters long, with a surface area covering approximately 3,900 square meters. For drivers traveling on this highway, the presence of animals on the roadway used to be a constant threat.
The I-25 supports traffic of more than 100,000 vehicles daily, making any improvised wildlife crossing a latent danger. Before the implementation of the crossing system, the corridor experienced at least one accident a day during migration seasons.
The Greenland Wildlife Overpass is part of the I-25 South Gap project, which improved 29 kilometers of road and closed gaps without safe crossings for wildlife. This system includes not only the bridge but also underpasses and fencing that guide animals to safe points.
The engineering of the overpass was adapted to the preferences of species such as elk and pronghorns, which tend to prefer open structures with good visibility. The location also plays a crucial role, connecting natural corridors and areas close to water resources.
The project was made possible thanks to funding of 15 million dollars, primarily provided by a grant from the Wildlife Crossings Pilot Program, part of the U.S. federal infrastructure law (IIJA). Organizations such as the Federal Highway Administration and Colorado Parks and Wildlife also participated in this initiative.
The implementation of wildlife crossings is not only aesthetically pleasing but also has a real impact on reducing accidents. In a world where infrastructure must evolve alongside environmental awareness, projects like this demonstrate that it is possible to integrate mobility without harming nature.
The results of this project will be observed over time, but it is already clear that sustainable mobility is viable without forcing nature to make unnecessary sacrifices. For more details, official information is available on the CDOT website.
