Starting Tuesday, September 6, road improvements will be occurring throughout the park. This proactive construction will assist in redefining the center line and fog lines to improve safety and overall appearance. The road work will start Tuesday evening, at the South Entrance of the park. Park visitors should
expect delays and closures. https://www.nps.gov/zion/learn/news/road-improvements-happening-overnight-this-september-in-zion-national-park.htm
Source: National Parks Zion