605 ILCS 5/6-310
Any person or persons interested in the establishment, widening, alteration or vacation of any township or district road is or are authorized to offer inducements to the highway commissioner or county superintendent of highways, as the case may be, for the establishment, widening, alteration or vacation of any such township or district road, by entering into contract with the commissioner or county superintendent, conditioned upon such establishment, widening, alteration or vacation, to pay money or other valuable thing to the district for the benefit of the road funds of the same; or to perform any labor, or construct any road, bridge or culvert on any road which such person or persons desires or desire to be established, widened or altered. Any such contracts in writing made with the highway commissioner or county superintendent shall be deemed good and valid in law and may be enforced by such commissioner or superintendent, or his successor in office, before the circuit court.
605 ILCS 5/6-310