Cam Sholly, the superintendent of the park predicted the same in March. He said, "I predicted a record season, and I think we're on track for that,"
The National Park Service (NPS) also issued a release which reminded visitors that summer is the most popular season for Yellowstone.
The release read, "Expect long lines at entrance stations, extremely busy facilities and destinations, as well as delayed travel times due to heavy traffic and wildlife jams. If you want a less crowded experience, arrive early or stay late and avoid main attractions such as Old Faithful, Grand Prismatic Spring, the Grand Canyon of the Yellowstone, and Norris Geyser Basin during peak hours."
Now the park is testing a shuttle with driverless technology.