1020.06  OPENINGS AND OBSTRUCTIONS; USE OF BARRICADES AND METAL PLATES.
   Deposits of excavated material or any other obstruction placed in a street right-of-way in the area of a work site shall be placed in such manner as to insure the least inconvenience to users of the street right-of-way. The opening and all obstructions shall be protected with adequate barricades during the time that work is not in progress. The Service Director may require that all trenches or other unfilled openings be covered by a metal plate sufficient to maintain uninterrupted vehicular or pedestrian traffic and may further specify the type and number of barricades as may be necessary to reasonably protect the public against injury to any person or drainage to any property.
(1966 Code § 901.06)