Illinois Statutes Chapter 75. Libraries § 16/15-45. Territory annexed

(a) For the purpose of Sections 15-5 through 15-40, any territory to be annexed to a library district shall be considered contiguous to the district notwithstanding that the territory is separated from the library district by a railroad right-of-way, but upon annexation the area included within the right-of-way shall not be considered to be annexed to the library district.

(b) Upon the annexation of territory by a district, the boundary shall extend to the far side of any adjacent highway and shall include all of every highway within the area annexed. These highways shall be considered to be annexed even though not included in the legal description set forth in the petition for annexation or the annexation ordinance.