Article XVIII
Sec. 2: When private property is taken for the use or benefit of the public, the necessity for using such property, and the just compensation to be made therefor, except when to be made by the State, shall be ascertained by a jury of twelve freeholders, residing in the vicinity of such property, or by not less than three commissioners, appointed by a court of record, as shall be prescribed by law: Provided, The foregoing provision shall in no case be construed to apply to the action of commissioners of highways in the official discharge of their duty as highway commissioners.