Regulatory signs are traffic signs
intended to instruct road users on what they must or should do (or not do) under a given set of circumstances. Other types may be signs located on streets and in parking lots having to do with parking, signs in public parks and on beaches or on or in architectural facilities prohibiting specific types of activities. The term regulatory sign describes a range of signs that are used to indicate or reinforce traffic laws
, regulations or requirements which apply either at all times or at specified times or places upon a street
, the disregard of which may constitute a violation, or signs in general that regulate public behavior in places open to the public.