Arches NP will require reservations for visits during high season

In an effort to reduce congestion and provide visitors with certainty that they'll be able to enter the park, Arches National Park will use a reservation system in 2022 to see if it solves those problems.

Such a proposal was raised back in 2017, when the park released a draft Traffic Congestion Management Plan. However, concerns that it could cost the Moab area upwards of $22 million in lost economic spending prompted the National Park Service to take a look at several other options for managing traffic. Among the options the park staff said it would examine were a shuttle system, which previously was deemed impractical, and a secondary entrance road, something Utah's governor had suggested.

https://www.nationalparkstraveler.org/2021/12/reservation-system-be-tested-arches-national-park-next-year