Stop signs & bagua connection?

Having done the classical Yang Fusion scheme, I was reflecting
on the bagua, and then started wondering about the history
behind the octagonal shape that stop signs take.

Unfortunately, the history here is less than enlightening.

From Wikipedia:
Stop signs originated in Michigan in 1915. The first ones had black letters on a white background and were 24 by 24 inches (61 × 61 cm), somewhat smaller than the current sign. As stop signs became more widespread, a committee supported by the American Association of State Highway Officials (AASHO) met in 1922 to standardize them, and selected the octagonal shape that has been used in the United States ever since. The unique eight-sided shape of the sign allows drivers facing the back of the sign to identify that oncoming drivers have a stop sign and prevent confusion with other traffic signs. It was also chosen so that it could be identified easily at night, since the original signs were not reflective.

I guess the only thing in common with the bagua, is that when you send
qi into it, you are wanting the qi to “STOP” being under the influence of
some negative emotion, LOL.

S