Haw. Rev. Stat. § 264-24: Powers of director.

The director of transportation shall have any powers which may be necessary for the full and effective performance and discharge of the duties imposed upon the director by this part or which may be necessary fully and completely to carry out and effectuate the purposes of this part.

The director may, on behalf of the State, with the approval of the governor, accept donations of land, money, or other property for deposit in the state highway fund or for any purpose of this part, upon such terms and conditions as are acceptable to the director, and not inconsistent with the proper discharge of the director's duties and functions or prejudicial to the obtaining of the federal-aid funds payable to the State without such donations.