Roadkill harms animals, endangers drivers, and costs billions of dollars every year. In Banff National Park in Alberta, Canada, wildlife scientist Tony Clevenger and other researchers have proven that constructing overpasses and underpasses for animals decreases roadkill and improves ecological connectivity. Many animals, including deer, elk, grizzlies, moose, lynx, cougars and others, have been recorded using the structures. Although animal crossing structures have been fairly common in Europe for a few decades, there are relatively few in North America.
Wildlife Crossings, Why There Should be More