Haw. Rev. Stat. § 291C-171.5: Collection of fines and costs.

(a) Unless discharged by payment or service of imprisonment in default of a fine, a fine may be collected in the same manner as a judgment in a civil action.

(b) Costs may be collected in the same manner as a judgment in a civil action, but shall not be deemed part of the penalty, and no person shall be imprisoned under this section in default of payment of costs.

(c) The state attorney general may institute proceedings to collect the fine, and costs, including interest and attorney's fees, as a civil judgment in the court of appropriate jurisdiction.