Ahhh, that explains it. I've always wondered why no-one pays attention to Yield signs. On Sat, Dec 10, 2011 at 08:23, Michael Kleber <michael.kleber@gmail.com>wrote:
Fortunately, it's only the teaser text on the front page that gets it wrong. The article itself gets mentions the correct polygon:
"The recommendations were based on a simple, albeit not exactly intuitive, idea: the more sides a sign has, the higher the danger level it invokes. By the engineers’ reckoning, the circle, which has an infinite number of sides, screamed danger and was recommended for railroad crossings. The octagon, with its eight sides, was used to denote the second-highest level."
--Michael
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