Some signs can be localized, such as no parking, and some are only found in state and local jurisdictions as they are based on state or local laws, such as New York City's "Don't Block the Box" signs.
En del skyltar kan ha lokala variationer, till exempel parkeringsförbud, och andra återfinns bara i lokala och delstatliga jurisdiktioner, såsom "Don't Block the Box"-skylten i New York City.