Zion National Park Rangers have proclaimed plans to increase DUI (Driving Under the Influence) check points and traffic patrols to strengthen security for the three million visitors of Zion annually. Jock Whitworth, Zion National Park Superintendent, announced: “Rangers in the National Parks have two essential missions. One is to preserve and protect natural and cultural resources in perpetuity. The other is to provide for the safe enjoyment of those resources by visitors.”