Subject to the limitations referred to in § 13a-32, the commissioner is authorized (a) to plan, design, lay out, construct, reconstruct, relocate, improve, maintain and operate the project, and reconstruct and relocate existing highways, sections of highways, bridges or structures and incorporate or use the same, whether or not so reconstructed or relocated or otherwise changed or improved, as parts of the project, and, to that end, to do and perform with respect to the project any act or thing which is mentioned or referred to in subsection (a) of § 13a-239; (b) to retain and employ consultants and assistants on a contract or other basis for rendering professional, legal, fiscal, engineering, technical or other assistance and advice; (c) to limit ingress to or egress from, and establish regulations for the use of, the project; and (d) to do all things necessary or convenient to carry out the purposes and duties and exercise the powers expressly given in sections 13a-32 to 13a-35, inclusive, 13a-127, 13a-160 and 13a-239 to 13a-246, inclusive. Except as otherwise stated in § 13a-32, nothing contained in sections 13a-33, 13a-34, 13a-35, 13a-127, 13a-160 and 13a-239 to 13a-246, inclusive, shall be construed to limit or restrict, with respect to the project, any power, right or authority of the commissioner existing under or pursuant to any other law.