The Knoxville Journal Express says the speed limit will be dropped from 65 to 55 “on the stretch of Highway 5/92 from the Y intersection to the north, past the Pleasantville exits.”
I am confused about where the “Y intersection” is — maybe the 5/92 split — but the road past Pleasantville is only 5, not 5/92.
The change is intended to reduce crashes but the four-lane around Pleasantville is pretty open, so there may be little real change in speed. It will lengthen the time to travel between Knoxville and Des Moines, since until now it’s been 65 mph after leaving Carlisle except for the 5/92/old IA 181 intersection.