The General Assembly shall enact no law authorizing private property to be taken for public use without just compensation, to be agreed upon between the parties or awarded by a jury, being first paid or tendered to the party entitled to such compensation, except that where such property in the judgment of the State Roads Commission is needed by the State for highway purposes, the General Assembly may provide that such property may be taken immediately upon payment therefor to the owner or owners thereof by said State Roads Commission, or into Court, such amount as said State Roads Commission shall estimate to be of the fair value of said property, provided such legislation also requires the payment of any further sum that may subsequently be awarded by a jury.