The person to whom the permit is issued shall at all times keep all openings and obstructions caused by removing the pavement carefully guarded and protected. During the time from one-half hour after sunset to one-half hour before sunrise, such permittee shall define such openings or obstructions by red or amber lights, and shall take such other precautions as are necessary to guard against accidents. At all times the work shall be done so as to cause the least inconvenience to the property owners and the general public.
(Ord. 28-53, passed 11-23-1953)