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For the curious: https://en.wikipedia.org/wiki/Botts%27_dots https://en.wikipedia.org/wiki/Botts%27_dots (named after Elbert Dysart Botts) https://en.wikipedi
by Stratoscope 6y ago
For the curious:
https://en.wikipedia.org/wiki/Botts%27_dots https://en.wikipedia.org/wiki/Botts%27_dots (named after Elbert Dysart Botts)
https://en.wikipedia.org/wiki/Raised_pavement_marker https://en.wikipedia.org/wiki/Raised_pavement_marker
https://en.wikipedia.org/wiki/Rumble_strip https://en.wikipedia.org/wiki/Rumble_strip