Illinois Route 108 runs east-west in the southwestern part of central Illinois. Its western endpoint is in Kampsville, in Calhoun County, and it includes a ferry across the Illinois River. The eastern end is along Interstate 55 between Springfield and St. Louis.
Illinois 108's western end is in Kampsville at Illinois 100, just north of the junction with Illinois 96...
Illinois 108's western end is in Kampsville at Illinois 100, just north of the junction with Illinois 96...
A block or so east of Illinois 100, Illinois 108 uses the Kampsville ferry to cross the Illinois River...
At Carrollton, Illinois 108 crosses US Route 67...
Illinois 108 meets Illinois 267 at a 4-way intersection...
Illinois 108 joins Illinois 111 south for a short concurrency...
After one mile of running southward with Illinois 111, Illinois 108 turns easterly toward Carlinville independently...
In Carlinville, Illinois 4 joins Illinois 108 from the north so both routes head easterly for a while...
On the east side of Carlinville, Illinois 4 splits off from Illinois 108 to resume heading south...
Illinois 108 ends at an interchange with Interstate 55 north of Litchfield:
