Sterling says roadside technologies have helped reduce collisions with bighorn sheep on that stretch of US 200. Reader-boards warn motorists bighorn sheep are present. Other, more costly technologies, such as specially engineered bridges and tunnels, have proven more effective elsewhere. While such infrastructure isn’t cheap, it lasts for decades, and often pays for itself in terms of reduced vehicle damage, human injuries, and hospitalization costs. Plus, it ensures more robust, resilient wildlife herds.