The Police Department shall have all powers and duties in relation to the management of vehicular traffic, as regulated in the Traffic Code. The Police Chief shall have the power, whenever he or she deems it advisable for the public safety or convenience, to temporarily close any street, alley or parts thereof to vehicular traffic or to vehicles of certain descriptions, or to divert traffic thereon, or to divert or direct the course of pedestrian travel.
(1937 Code, Title I; 1969 Code §143.05)