^Looking east at an intermediate trailblazer for Illinois 147, a few miles west of Illinois 145, February 2023.
Illinois Route 147 is a short route serving as a bit of a shortcut, leading northeast from Vienna to Illinois 145 in southern Illinois. Running only in Johnson and Pope Counties, it can be used to access some sightseeing destinations in the Shawnee National Forest.
From its southwestern end, Illinois 147 heads north and east through Simpson to end at Illinois 145. It intersects no other highways between these two endpoints.