Any person laying or making an excavation in or doing any work in any street, sidewalk or other public place shall maintain suitable barricades to prevent injury to any person or vehicle by reason of the work.  Barricades shall be protected by suitable lights at night.  Any defect in any pavement shall be barricaded to prevent injury.  Any person maintaining any opening or excavation in any such place shall guard the opening or excavation while the same remains open, by proper barricades and lights.  No person shall interfere with or disturb any barricades or lights lawfully placed to protect or make new pavement or excavation or opening in any street, alley or sidewalk.
(1981 Code, § 5.12)  Penalty, see § 10.99