Kevin Lacy (Chief Traffic Engineer for the North Carolina DOT) doesn't think so according to the article Citizen Activist Grates on State Over Traffic Signals. The DOT hired a consultant traffic engineer to perform a traffic signal justification study for two intersections in Raleigh, NC. The consultant concluded traffic signals weren't needed as part of a road reconstruction project. David Cox submitted his own traffic analysis on behalf of his home owners association that disagreed with the consultant traffic engineer's analysis and conclusions.
I'm used to seeing citizen letters commenting on my traffic studies. Some of them have even come with sketches for alternative roadway/traffic control designs. In Minnesota, there are usually public hearings and citizen comments are asked for and considered in the design process. Apparently Cox's analysis was too well done though. Lacy submitted a complaint to the licensing board alleging Cox was practicing engineering without a license.
Cox was commenting on the design as a citizen. As I understand it, the report never claimed to be prepared by a licensed engineer. It will be interesting to see if the licensing board finds Cox was in fact practicing engineering without a license.
Whether Cox has illegally practiced engineering or not, I wouldn't have lodged a complaint. Ken Ashfeld, my boss when I was at the City of Maple Grove, beat into my head that the citizens are our true bosses and that we must respectfully listen to them. Then we must logically respond with our engineering analysis and recommendation.
Cox's comments should have been reviewed the same way any other citizen comment should be reviewed – with respect and consideration. It just so happened that Cox did a better job with his analysis than most citizens do (I'm guessing the citizens were persistent as well).
Instead of going to the licensing board, a better response would have been a letter that either changed the decision about the signals or reaffirmed the decision in light of the new "evidence" submitted. Then move on.