Wildlife and highways don't mix, which is why this idea is so brilliant.
The "Path of the Pronghorn," (red and pink on this map) is a 100-mile journey antelope have made across Wyoming for 6,000 years. But this ancient migration route is under pressure, and a big problem was Highway 191 — antelope and cars are a bad combination!
Squeezed between a river on one side and expanding human development on the other, hundreds of antelope were forced to cross a very busy highway at one concentrated place — with unfortunately predictable results.
The solution involved some good ol' American engineering plus the adaptability of thousands of antelope. Watch this to find out what they did: