The Police Commissioner is hereby authorized and empowered to make and enforce special regulations with regard to the traffic, at certain hours, when the safety or convenience of the public will best be subserved thereby. City Code, 1927, art. 4, §60 1950, art. 38, §87 1966, art. 31, §105 1976/83, art. 31, §77 Ord. 08-139