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Great post as usual. I learned a few new details I hope to employ some day in my own infrequent charting duties.

One minor brow-wrinkling: what's the point of referring to the designer—who I can't find credited by name on the graphic or in any public posts about the chart, though perhaps in the book—as "she"? It seems needlessly specific to the point of being, well, pointed.


Yet another problem might be a change in the level of riding in states with law changes. I'm not a motorcyclist, but it's clear that mandatory helmet laws for bicyclists cut down on bicycling. So maybe there's more motorcycling after the law is changed -- meaning the risk per hour might not be different.

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