[math-fun] Stop signs

JPropp> What is the officially approved way to manufacture a stop sign? Is a perfectly made stop sign really a regular octagon, or is it something slightly different? (My hope is that the answer varies from state to state.) <Jim Propp If your hope is right, this urgently requires new Federal regulations! Someone connected with the MIT Model Railroad Club collected photos of stopsigns. They had a green one. From Maine, I think. Conjecturally, a chemical changeling. --rwg OMG, https://www.google.com/search?q=green+stop+sign&client=firefox-a&hs=99u&rls=...