605 ILCS 5/4-510
The Department may establish presently the approximate locations and widths of rights of way for future additions to the State highway system to inform the public and prevent costly and conflicting development of the land involved.
The Department shall hold a public hearing whenever approximate locations and widths of rights of way for future highway additions are to be established. The hearing shall be held in or near the county or counties where the land to be used is located and notice of the hearing shall be published in a newspaper or newspapers of general circulation in the county or counties involved. Any interested person or his representative may be heard. The Department shall evaluate the testimony given at the hearing.
The Department shall make a survey and prepare a map showing the location and approximate widths of the rights of way needed for future additions to the highway system. The map shall show existing highways in the area involved and the property lines and owners of record of all land that will be needed for the future additions and all other pertinent information. Approval of the map with any changes resulting from the hearing shall be indicated in the record of the hearing and a notice of the approval and a copy of the map shall be filed in the office of the recorder for all counties in which the land needed for future additions is located.
Public notice of the approval and filing shall be given in newspapers of general circulation in all counties where the land is located and shall be served by registered mail within 60 days thereafter on all owners of record of the land needed for future additions.
The Department may approve changes in the map from time to time. The changes shall be filed and notice given in the manner provided for an original map.
After the map is filed and notice thereof given to the owners of record of the land needed for future additions, no one shall incur development costs or place improvements in, upon or under the land involved nor rebuild, alter or add to any existing structure without first giving 60 days notice by registered mail to the Department. This prohibition shall not apply to any normal or emergency repairs to existing structures. The Department shall have 45 days after receipt of that notice to inform the owner of the Department's intention to acquire the land involved; after which, it shall have the additional time of 120 days to acquire such land by purchase or to initiate action to acquire said land through the exercise of the right of eminent domain. When the right of way is acquired by the State no damages shall be allowed for any construction, alteration or addition in violation of this Section unless the Department has failed to acquire the land by purchase or has abandoned an eminent domain proceeding initiated pursuant to the provisions of this paragraph.
Any right of way needed for additions to the highway system may be acquired at any time by the State or by the county or municipality in which it is located. The time of determination of the value of the property to be taken under this Section for additions to the highway system shall be the date of the actual taking, if the property is acquired by purchase, or the date of the filing of a complaint for condemnation, if the property is acquired through the exercise of the right of eminent domain, rather than the date when the map of the proposed right-of-way was filed of record. The rate of compensation to be paid for farm land acquired hereunder by the exercise of the right of eminent domain shall be in accordance with Section 4-501 of this Code.
Not more than 10 years after a protected corridor is established under this Section regardless of whether the corridor is established before or after the effective date of this amendatory Act of the 97th General Assembly, and not later than the expiration of each succeeding 10 year period, the Department shall hold public hearings to discuss the viability and feasibility of the protected corridor. In the case of a protected corridor established prior to 10 years before the effective date of this amendatory Act of the 97th General Assembly, the hearing shall be conducted within 6 months of the effective date of this amendatory Act of the 97th General Assembly. The Department shall retain the discretion to maintain any protected corridor established under this Section, but shall give due consideration to the information obtained at the hearing and, if the Department in its discretion determines that construction of the roadway is no longer feasible, the Department shall abolish the protected corridor.
605 ILCS 5/4-510