No lands or rights-of-way or easements therein shall be taken by eminent domain under the provisions of sections 16-263 to 16-269, inclusive, in any public street or highway, public park or reservation or other public property, or within the location of any railroad company, as defined in section 13b-199, or other public utility company; provided such pipeline or pipelines may be constructed under or through any public highway or street, public park or reservation or other public property if the method of such construction and the plans and specifications therefor have been approved by the authority having jurisdiction over the maintenance of such public highway or street, public park or reservation or other public property; and provided such pipeline or pipelines may be constructed over or across the location of any railroad company, as defined in section 13b-199, or other public utility company by agreement with such railroad company or other public utility company or, in the event of failure so to agree, then with the approval of and in such manner as may be determined by the Public Utilities Regulatory Authority.