If you’ve ever doubted the effectiveness of wildlife overpasses, this video from Idaho Fish and Game posted a couple of weeks ago might just change your mind. Over a span of two months, cameras captured more than 1,000 deer safely crossing the Cervidae Peak Wildlife Overpass in Idaho—proving that these structures do exactly what they’re designed to do. Not only is it incredible to see so many animals using the overpass, but the footage itself is a fascinating look at how wildlife adapts to man-made solutions. Check it out and see for yourself!