Kankakee County Highway 18 is a north-south highway connecting IL St Rt 17 to IL St Rt 115 in Western Kankakee County. This route runs aproximatly 4 mile. KCH 18 does not pass through any towns. KCH 18 intersects the following major local roads. Illinois State Route 17, near Reddick. Kankakee County Highway 25, near Reddick. Illinois State Route 115, near Buckingham.