Any sign not of the state is not a state enforced notice. Any speeding, stop, etc. if not registered with the state may very-well not be enforceable Even better state law can only be applied on state land, and if on state land it must be “for hire” before it applies.
p.s. Stickers can easily be removed by kids, so if someone can find the chain of command that places state signed.
Click HERE to view the list of foundational information created by Lawyer Paul John Hansen to aid in independence from the US System. Done in free inhabitant.info, need done in pauljjhansen.com.