The permittee, in the conduct of the work, use or maintenance of an encroachment authorized by a permit issued pursuant to this Chapter, shall provide, erect and/or maintain such lights, barriers, warning signs, patrols, watchmen and other safeguards as are necessary to protect the traveling public. Any omission on the part of the Director of Public Works to specify in the permit what lights, barriers or other protective measures or devices shall be provided, erected or maintained by the permittee, or the fact that the Director of Public Works or his representative may not specify sufficient lights, barriers or other protective measures or devices, shall not excuse the permittee from complying with all requirements of law and appropriate regulations and ordinances for adequately protecting the safety of those using public streets. If at any time the Director of Public Works finds that suitable safeguards are not being provided, the City may provide, erect, maintain, relocate or remove such safeguards as are deemed necessary, or may cancel the permit and restore the right of way to its former condition, all at the expense of the permittee.
A permittee making any excavation, or erecting or leaving any obstruction within, under or upon the right of way, or causing the same to be made, erected or left, shall place and maintain lights at each end of the excavation or obstruction at not more than fifty (50) foot intervals along the excavation of obstruction from one-half (1/2) hour before sunset of each day to one-half (1/2) hour after sunrise of the next day until the excavation is entirely refilled or the obstruction is removed and the right of way is made safe for use. Reflectorized warning signs conforming to the requirements of the Division of Highways of the State shall be placed 100 feet in advance of any obstruction or excavation within the traveled way in such a position as to adequately warn vehicular traffic, and on major streets additional similar signs shall be placed 400 feet in advance of construction.
The warning signs, lights and other safety devices shall conform to and be placed as required by the applicable requirements of the Vehicle Code of the State and to any sign manual used by the Department of Public Works of the State, and to the standard specifications of the City.
Unless specifically permitted by the Director of Public Works, open trenches in excess of 300 feet in advance of the pipe line operation shall not be permitted. In no case shall there be more than 500 feet of open trench at any one time.