1. The construction and maintenance of said highway system and all work incidental thereto shall be under the general supervision and control of the state highways and transportation commission, which is hereby authorized, empowered and directed to take whatever steps may be necessary to cause said state highway system to be constructed at the earliest possible time, consistent with good business management and funds available, after this chapter takes effect, and also to provide for the proper maintenance of said state highway system.

2. The state highways and transportation commission shall have power to make all final decisions affecting the work provided for herein and all rules and regulations it may deem necessary not inconsistent with this chapter for the proper management and conduct of said work and for carrying out all of the provisions of this chapter in such manner as shall be to the best interest and advantage of the people of the state.

3. The commission is hereby given power and authority to purchase, lease, or otherwise acquire and supply any tools, machinery, supplies, material and labor needed for said work and to pay for engineering, preparation of plans and specifications, cost of advertising, engineering supervision and inspection, and all expenses and contingencies in connection with the construction and maintenance of such state highway system.