65 ILCS 5/11-91.1-4
In addition to the amounts heretofore authorized to be paid by the municipality, the municipality may, as a part of the cost of construction, make a payment to the owner of real property acquired for a Federal Aid highway project which is improved by a single, two or three family dwelling actually owned and occupied by the owner for not less than one year prior to the initiation of negotiations for the acquisition of such property, an amount which, when added to the acquisition payment, equals the average price required for a comparable dwelling determined in accordance with standards established by the municipality to be a decent, safe and sanitary dwelling adequate to accommodate the displaced owner, reasonably accessible to public services and places of employment and available on the private market. Such payment shall not exceed the sum of $5,000, and shall be made only to a displaced owner who purchases and occupies a dwelling that meets the standards established by the municipality within one year subsequent to the date on which he is required to move from the dwelling acquired for the highway project. Any individual or family not eligible to receive such payment, who is displaced from any dwelling which dwelling was actually and lawfully occupied by such individual and family for not less than ninety days prior to the initiation of negotiations for acquisition of such property, may be paid by the municipality an amount necessary to enable such individual or family to lease or rent for a period not to exceed two years, or to make the down payment on the purchase of a decent, safe and sanitary dwelling of standards adequate to accommodate such individual or family in areas not generally less desirable in regard to public utilities and public and commercial facilities. Such payment shall not exceed the sum of $1,500.
65 ILCS 5/11-91.1-4