La Salle County Highway 40 is a east-west route in Southern La Salle County. This highway connects Illinois State Route 18 to Illinois State Route 170. LSCH 40 does not pass through any town. LSCH 40 intersects the following major local roads. Illinois State Route 18 near Kernan. Illinois State Route 170 south of Ransom.
The first WB guide marker. EB LSCH 40 west of IL St Rt 170.
