That system means vehicles with license plates ending in an odd number will be able to enter the park on odd days of the month, while even numbers (including zero) will be granted access on even days of the month, according to the service. The system is in place to ensure the south loop is not overwhelmed by visitors, the park service said.
Cars, campers and trucks lined up before sunrise Wednesday outside the south entrance of Yellowstone National Park waiting to gain entry for the first time in more than a week.
George Frey/Getty Images
The park’s north loop, accessed by the North and Northeast entrances, remains closed, the service added.
CNN’s Claudia Dominguez contributed to this report.