At the Bronson corner, July 20, 2012. (I have yet to finish picture-cropping and a trip report.) Note the “Speed Limit 50” at the far left of the photo, the rule for old IA 982, which was IA 141 before that.
Woodbury County had directional tags for the detoured routes, which were helpful since the roads in the Loess Hills area don’t follow section lines.