Powers of authority relative to public highways

10. a. Subject to the limitations of this act, the authority shall have the power to construct traffic circles, interchanges and grade separation at intersections of any project with public highways and to change and adjust the lines and grades of the public highways so as to accommodate them to the design of the project. The cost of construction and any damage incurred in changing and adjusting the lines and grades of the public highways shall be ascertained and, unless otherwise provided for, paid by the authority as a part of the cost of the project. b. Subject to the limitations of this act, if the authority shall find it necessary in connection with any project to change the location of any portion of any public highway, the authority shall cause the public highway to be reconstructed at any location as the authority deems most favorable and of substantially the same type and in as good condition as the original public highway. The cost of the reconstruction and any damage incurred in changing the location of any highway shall be ascertained and, unless otherwise provided for, paid by the authority as a part of the cost of the project. c. Any public highway affected by any project may be vacated or relocated by the authority in the manner now provided by law for the vacation or relocation of public roads and any damages awarded on account thereof shall be ascertained and, unless otherwise provided for, paid by the authority as a part of the cost of the project.