605 ILCS 5/4-505
In addition to whatever powers the Department may by law now possess, whenever it is necessary as an incident to the construction of a new State highway or the relocation, reconstruction, extension, widening, straightening, alteration, repair, maintenance or improvement of an existing State highway (including extensions of a new or existing State highway through or into a municipality upon a new or existing street) that the line or tracks of a railroad or railway company or the wires, poles, pipes or other facilities of a public utility, which are not then located in or upon a public street or highway, be relocated, and the Department and such company or public utility have entered into an agreement, approved by the Illinois Commerce Commission, concerning such relocation, the Department is authorized to purchase, or to acquire through the exercise of the right of eminent domain under the eminent domain law of the State, such easements, rights, lands or other property as may be necessary for the relocation of said railroad or railway line or tracks or other public utility facilities.
The Department is authorized to convey such easements, rights, lands or other property it has so purchased or acquired for said relocation of the said railroad, railway company or other public utility by deed executed by the Director of the Department.
605 ILCS 5/4-505