According to GMSV, US 14/83 is still signed through Pierre as of November and the truck route remains signed.
Legislative session just started up last Tuesday, the redesignation has to get approved by the legislature (rubber-stamp, our routes are codified in state law for some reason) then the signs need to be ordered and put up. I'm not expecting anything until April at the earliest to allow for warmer temps. The guy I talked to at work about it will probably tell me when it's done, and/or I can ask the politicians I know if that bill's passed yet. Will field-check periodically as life allows as well.
Saw an article in the local free paper at the grocery store about this, the designation will take affect July 1st. Not sure how fast signage will follow since we haven't had a new designation in... a long time...
https://www.thedakotascout.com/p/capital-citys-truck-crushing-bridge
Law took affect July 1st, route GIS has been updated (
https://experience.arcgis.com/experience/c0d19beb93784872bd6dc8a06382010b). Not sure when signs go up, but they are doing a utility project on Euclid so will probably put signs up as part of it. These usually get done in the fall. I'll field check around Labor Day for sure, maybe earlier.