The Arizona state park has made changes to its entry policy to allow vehicles to stand on Highway 89A after the park's parking lot reaches capacity, replacing the previous system of waiting for a spot. The changes were made due to safety concerns for rangers and drivers. The park will close the parking lot when all the available spots are full, taking up to a significant number of spots for another rush of visitors, which could take up to an indefinite amount of time. The change requires early morning visitors to the park.