(1) A person commits the offense of obstructing a highway or other public passage if, having no legal privilege to do so and acting alone or with another person, he or she renders any highway or other public passage impassable to pedestrian or vehicular traffic.
(2) It is a defense to a prosecution under this section that: The highway or other public passage was rendered impassable solely because of a gathering of persons to hear the defendant speak or otherwise communicate;
(3) The defendant was a member of a gathering contemplated by subdivision (b)(1) of this section; or
(4) The highway or public passage obstructed has not been established as a city street, county road, or state or federal highway under the laws of this state and no civil court has established a right of passage by prescription for the highway or public passage.
(5) Obstructing a highway or other public passage is a Class C misdemeanor.