"State Police" (or "State Troopers", or "{$state} Highway Patrol, are different from "County Sherif[s | [Deputies]" and city/town/village police. Each level has a local jurisdiction. A city police officer (a subset of city authorities) tends to have authority to restrict actions according to law. Also, a city or park official may technic'ly have the right to do so according to law & park regulations…although some non-pliable people may force the official to summon police.