“Wayfarer criteria” is the rejection reason when the ML (machine learning ai) model has rejected a nomination. In that case your email will say “our team” instead of the “community” and the decision will usually have come around 20-24 hours after you submitted it.
My guess is that it detected the word “truck” and thought this was moveable. I actually really like this nomination and I would appeal this one if that sign is permanent. It does seem like a great place for being social and exploration to me. I cannot promise an appeal will be accepted, of course.
I can’t find this sign on the map though and think I am in the general area. You can give coordinates if you would like me to look closer. I can also check whether this nomination is in an L17 S2 cell by itself if you want to prioritize Wayspot appeals to ones that are eligible to become Pokestops.