Any person who shall willfully and unnecessarily hinder, obstruct or delay or who shall willfully and unnecessarily attempt to delay, hinder or obstruct any other person in lawfully driving or traveling along or upon any street or who shall offer for barter or sale merchandise on the street so as to interfere with the effective movement of traffic shall be guilty of a misdemeanor.
('73 Code, § 21-41) Penalty, see § 70.999