That system means that vehicles with a license plate ending in an odd number will be able to enter the park on odd days of the month, while the odd number (including zero) will be allowed on even days of the month, according to the service.
That’s to slow down visitor traffic, the park service said. While there were “major backups” on Wednesday morning, they were cleared in a matter of hours at each entrance, park service officials said in a news release.
Less than 5,000 vehicles entered the South Loop on Wednesday – a big difference from the usual 10,000 or more cars entering, Park Service said.
“It’s too early to say whether the license plate system worked, but it seems to have done its job by halving our normal traffic volume,” Park Superintendent Cam Sholay said in a statement. “We are pleased to have visitors back in Yellowstone and appreciate the patience of the public and community partners as we continue to work through this difficult situation.”
Outside the southern entrance to Yellowstone National Park, cars, campers and trucks are waiting to enter for the first time in more than a week before sunrise on Wednesday.
George Frey / Getty Images
The park is accessed through the north loop, north and northeast entrances, it remains closed, the service adds.
Claudia Dominguez and Paradise Officer of CNN contributed to this report.