Okay so poking around on street view it looks like that one pair of shields on NB Main St has continuously been there and was never gone. On the other hand that pair of signs seems to be the only pair of signs currently present.
There was
another pair on the southbound exit 365 offramp in 2013, but those were
gone by 2018, so we've also got a trend towards unsignage here.
Meanwhile, interstate business loops in Utah do not officially exist on paper as far as UDOT is concerned. And with only one sign still there, trying to even define the routing would require presuming the now-removed signs remain accurate.
I can appreciate that the prior assertion that the route was "unsigned" isn't 100% accurate but... stupid truck routes.
Anyone else have an opinion here on whether Schroedinger's business loop does or doesn't exist?