Zion National Park in southwestern Utah is considering an online reservation system for people who want to visit the park’s “frontcountry,” or most popular areas. The park’s website says visitation has surged in recent years. In 2015, more than 3.6 million people visited the park, up 450,000 from 2014, which was also a record year. Visitors reportedly wait in long lines to enter the park and board the shuttle during the height of the summer. Parking spaces within Zion are routinely filled by 9:30 a.m., which adds to congestion in the nearby town of Springdale.