The Authority shall have the right of eminent domain to acquire private property and property devoted to any public use which is necessary for the purposes of the Authority, provided, however, the Authority shall have the right of eminent domain to acquire the property or properties mentioned in Section 7 hereof extending beyond the boundaries of the metropolitan area. However, the Authority shall have the right of eminent domain to acquire property of any railroad which is not used for the transportation of persons or property and to acquire rights and easements across, under or over the right of way of such railroad. The Authority shall have power to require persons or corporations owning or operating public utility structures and appliances in, upon, under, over, across, or along the public roads, streets, or other public ways in which the Authority has the right to own, construct, operate or maintain transportation facilities (1) to remove these public utility structures and appliances from their locations, and (2) to relocate them in such places elsewhere in the public roads, streets, or public ways as may be designated by the corporate authorities having control of such public roads, streets or public ways, either temporarily or for the remainder of the period of the grant, license, or franchise which the specified persons or corporations have to occupy such public roads, streets, or public ways for public utility purposes. If any person or corporation owning or operating public utility structures and appliances fails or refuses so to remove or relocate them, the Authority may remove or relocate them. However, the power of the Authority to so remove or relocate public utility structures and appliances itself, or to require persons or corporations owning or operating public utility structures and appliances to so remove or relocate them, shall be exercised only upon such terms and conditions as the Authority and these persons or corporations may agree upon, or in default of such an agreement, upon such fair and reasonable terms and conditions as the Authority may prescribe. These terms and conditions may include fair and reasonable provisions as to how much of the expense of the removal, or relocation shall be paid by the owners or operators of public utility structures and appliances.