It is the duty of every person cutting or making an excavation in or upon any public place, street, alley, or right-of-way to place and maintain barriers and warning devices necessary for the safety of the general public. Barriers, warning signs, lights, etc., shall conform to the requirements and recommendations of the Manual On Uniform Traffic Control Devices (MUTCD) and APWA, as a minimum, and those of the Director. Warning lights shall be electrical markers or flashers used to indicate a hazard to traffic from sunset of each day to sunrise of each day. Reflectors or reflecting material may be used to supplement but not replace light sources. The permittee shall take appropriate measures to assure that during the performance of the excavation work traffic conditions as near as normal as possible shall be maintained at all times so as to minimize inconvenience and risk of injury to the general public and the occupants of the adjoining property. When traffic conditions permit, the Director may authorize the closing of a street or alley to all traffic for a period of time prescribed by him if, in his opinion, it is necessary to expedite the excavation work or maintain the safety of the excavation crews or the general public. The approval shall be based upon submission and approval of an appropriate and acceptable traffic control, signage, and detouring plan and may require the permittee to give notification to various public agencies and to the general public in advance of the closing. The approval shall not be valid until the notice has been given. (Ord. 2019-09, 5-9-2019)