Materials removed from a highway incident to its improvement or maintenance which are suitable for reuse or have a market value, and which are not used in or disposed of under the contract for the work, shall become the property of the duly constituted authority maintaining the highway from which the material was removed and may be used or disposed of by such authority in the manner as in its judgment is for the best interest of the public, and any money received for such material shall be paid into the maintenance fund.