Maine Revised Statutes Title 29-A. Motor Vehicles § 2078. Emergency rule

For public safety or convenience, during a fire, accident, emergency or special event, a law enforcement officer may temporarily close a way to vehicular traffic or to vehicles of a certain description, or divert pedestrian or vehicular traffic.

An operator or pedestrian commits a Class E crime if that operator or pedestrian refuses to follow the directions for the movement of vehicles or pedestrians on request or signal of a law enforcement officer or if the operator or pedestrian knowingly refuses to follow the direction of a sign clearly posted by a law enforcement officer to temporarily close a way to vehicular traffic or to vehicles of a certain description or to divert pedestrian or vehicular traffic during a fire, accident, emergency or special event. For the purposes of this section, a posted sign must include language sufficiently describing the restriction or prohibition and must include the fact that a violation is a Class E crime.