605 ILCS 5/10-202
The county board of any such county is empowered to appropriate moneys for the purpose of assisting in the construction or repair of any such bridge or bridges, or bonds of such county may be issued for that purpose as follows: Upon the filing with the county clerk of a petition signed by 100 electors of such county who are owners of land therein, requesting that the proposition of issuing bonds of that county for such purpose be submitted to the electors of such county for their approval or rejection, the county clerk shall certify the petition to the proper election officials, who shall submit the proposition at a regular election. Such referendum shall be conducted and notice given in accordance with the general election law.
605 ILCS 5/10-202