Mark Lawler, an environmental specialist with the Colorado Department of Transportation, consults images of a tunnel created for wildlife’s safe passage beneath three lanes of speeding traffic. (Photo by Matthew Staver for The Washington Post)
Eight-foot-tall fencing along both sides of U.S. Highway 285 in Colorado helps funnel animals toward a special underpass crossing. (Photo by Matthew Staver for The Washington Post)
Tracks provide evidence that animals use the $3.5 million tunnel project. (Photo by Matthew Staver for The Washington Post)
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