Massive wildlife overpass has helped reduce wildlife-vehicle collisions by 91% in Colorado

The Colorado Department of Transportation completed North America’s largest wildlife overpass on I-25 between Denver and Colorado Springs. The structure has reduced wildlife-vehicle collisions by 91%. Various species, including elk and mountain lions, now use the overpass to cross the highway safely.
In December 2025, it was announced that the Colorado Department of Transportation (CDOT) had completed the construction of the I-25 wildlife overpass in the area of Greenland, between Denver and Colorado Springs. Becoming the largest wildlife overpass in North America, it’s used by elk, pronghorn, mule deer, black bears, mountain lions, and many other species, […]
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