I don't think anyone is disputing the law beyond claiming that it's stupid. And, in this case, the board members were all certified traffic engineers and were

I don't think anyone is disputing the law beyond claiming that it's stupid. And, in this case, the board members were all certified traffic engineers and were reviewing this other person's offered analysis (or, rather, deciding to go after the person for their affront in even offering the analysis at all without having a certification). As others have pointed out, Oregon is very selectively enforcing the law. It's pretty hard not to conclude that some asshole decided to go after someone for pointing out problems with work for which they were somewhat responsible.