(Amended by Ord. No. 121,900, Eff. 6/4/62.)
Except as otherwise provided in Section 62.42, no person shall open or remove the cover of any manhole, or allow any manhole to remain open in or upon any street or sidewalk, without first placing immediately adjacent to the opening of any manhole, a barrier or manhole guard at least two red flags, and, from sunset until sunrise of the following day, at least two warning lights. Such guards or warning devices shall be maintained at all times while the manhole remains open. Such warning devices shall be so located that they are clearly visible to approaching traffic.