Wildlife Overpass Making a Difference

In Colorado, innovation and conservation are coming together in a powerful way—right over one of the state’s busiest highways.

A First-of-Its-Kind Solution

The Greenland Wildlife Overpass, now the largest in North America, stretches across Interstate 25 between Castle Rock and Monument. Designed as a natural, landscaped bridge, it allows animals like elk, moose, deer, bears, and mountain lions to safely cross a six-lane highway that once divided their habitat.

Spanning 200 by 209 feet and reconnecting 39,000 acres of land, the overpass is more than just infrastructure—it’s a lifeline.

A Response to a Serious Problem

Before the overpass, this stretch of I-25 saw an average of one wildlife-vehicle collision every single day. Some of those incidents turned tragic, including fatal crashes involving drivers.

Nationwide, more than one million wildlife collisions occur each year, making projects like this not just beneficial—but necessary.

Safer Roads, Stronger Ecosystems

The overpass is part of a larger $419 million corridor improvement project aimed at reducing collisions by up to 90%. Additional crossings and miles of wildlife fencing help guide animals safely to designated crossing points, protecting both drivers and wildlife.

Governor Jared Polis called the project a “momentous feat,” highlighting Colorado’s leadership in balancing infrastructure with environmental stewardship.

A Growing Movement Across the Country

Colorado isn’t alone. At least 19 states are now developing similar crossings, recognizing that thoughtful design can prevent accidents, save lives, and preserve natural habitats.

From Texas to New York, wildlife crossings are proving to be a smart investment in both safety and sustainability.

A Win-Win for All

At its core, the Greenland Wildlife Overpass represents something simple: a solution that works for everyone.

Fewer accidents. Safer roads. Protected wildlife.

Because sometimes, the best way forward—is to build a better path across.