No person placing or having any building, structure or material, or digging or having dug any trench or excavation, in any street, alley or public place shall fail to display thereat during the night a red light or pot torch placed so conspicuously as to warn all approaching persons. No person shall take away, turn over or in any way interfere with such light.
(Ord. 4141, passed 8-1-1950)