605 ILCS 5/6-319
Township and district roads may be laid out, widened, altered or vacated on county or district lines, or from one district to another, and in case a railroad right-of-way or stream of water joins the boundary line of such county or district line, then along the line of such railroad right-of-way or stream of water, in the same manner as other township and district roads, except that in such cases, a copy of the petition shall be posted in and presented to the highway commissioners of each district interested; such petition to be as in other cases, and signed by not less than 5% of the legal voters, or 12 legal voters, whichever is less, residing in the district or county. Whereupon the highway commissioners of the several districts shall meet and act together, in the same time and manner as in other cases, in considering the petition, viewing the premises, adjusting damages, and making all orders in reference to such proposed road, widening, alteration or vacation, and a copy of all final orders and plats and papers shall be filed and recorded in each of the counties and districts interested. In case the commissioners are unable to agree, the county superintendent of highways shall act as arbitrator between them in case the districts shall lie within the same county, and if in different counties the Department or any person designated by it, shall so act. All appeals hereinbefore provided for in this Division of this Code may likewise be taken to the county superintendent of highways, or in case the districts shall lie in 2 or more counties, to the Department.
In lieu of petitions, the highway commissioners of all road districts interested may file a certificate to vacate roads with the respective county clerks and with the respective township or district clerks, as the case may be. The procedure upon the filing of such certificates shall be the same as, and conform to, the procedure followed upon the filing of a petition.
605 ILCS 5/6-319