§ 95.31 PROTECTIVE MEASURES AND ROUTING OF TRAFFIC.
   (A)   It shall be the duty of every person, firm or corporation cutting or making an excavation in or upon any public way to place and maintain barriers and warning devices necessary for the safety of the general public. Barriers, warning signs, lights and the like shall conform to the requirements of the City Commission. Warning lights shall be flares, torches, lanterns, electrical markers or flashers used to indicate a hazard to traffic from sunset of each day to sunrise of the next day. Torches shall be open, wick or flame flares generally used in connection with roadway repairs or construction and operating on kerosene or similar fluid. The City Commission may restrict the use of lanterns or open flame devices in fire hazard areas.
   (B)   The permittee shall take appropriate measures to assure that during the performance of the excavation work, traffic conditions as near normal as possible shall be maintained at all times so as to minimize any inconvenience to the occupants of the adjoining property and to the general public.
   (C)   When traffic conditions permit, the Director of the Department of Public Works may, by written approval and by the consent of the Chief of Police, permit the closing of streets and alleys to all traffic for a period of time prescribed by the Director of the Department of Public Works and the Chief of Police, if in their opinion it is necessary. Such written approval may require the permittee give notification to various public agencies and to the general public.
   (D)   Warning signs shall be placed far enough in advance of the construction operation to alert traffic within a public street, and cones or other approved devices shall be placed to channel traffic in accordance with the instructions of the Director of Public Works and Chief of Police. Where necessary to the Director of the Department of Public Works and the Chief of Police, traffic control devices and traffic control flag persons shall be furnished at the expense of the permittee.
(1990 Code, § 4.12)