Section 625 ILCS 40/1-2.05(a) "Highway" means the entire width between the boundary lines of every way publicly maintained when any part thereof is open to the use of the public for purposes of vehicular travel.(b) "State highway" means State highways as defined in the Illinois Highway Code.(c) "Interstate highway" means any highway which now is, or shall hereafter be a part of the national system of interstate and defense highways within this State.(d) "Controlled access highway" means every highway, street or roadway in respect to which owners or occupants of abutting lands and other persons have no legal right of access to or from the same except at such points only and in such manner as may be determined by the public authority having jurisdiction over such highway, street or roadway.(e) "Tollroad" means all highways under the jurisdiction of the Illinois State Toll Highway Authority.