Both of these changes were made after they appeared in the AASHTO meetings.
The Business 30 in Linn County was in the Spring 2020 meeting and the Business 151 relocation was in the Fall 2021 meeting.
I received what admittedly is a non-answer from the DOT, telling me cities are in charge of the business route signage. Historically, however, business routes are created whenever the bypass opens. Since the Business 30 is after-the-fact, the state would have to replace brand-new signs.
Both of these changes were in a pack I recently sent. If you think they should be reverted, I don't know what to say. I can see both sides. Do we accept the route as AASHTO believes exists and in fact approved, or do we only go by whatever is in the field?