A wildlife overpass cut I-25 animal collisions by 91 percent
In the 10 months since the Greenland crossing opened near Castle Rock, drivers hit two animals on a stretch that used to see about one collision a day.

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In the 10 months since the Greenland wildlife crossing opened on I-25 near Castle Rock, drivers have hit two animals on a stretch that used to average about one collision a day. That is a 91 percent drop. Pronghorn crossed I-25 on the overpass for the first time in decades.
Six more crossings are being designed. The count is collisions, not a claim that every animal in the corridor now uses the bridge.
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