yep.. if they put those in minnesota, the snow plows would scrape them all up in a day.

I did see a design for reflective bumps for cold-climate.. they were spring-loaded so they would get shoved down into the pavement when run over.. and popup afterwards. also had a nifty relfector that would change color when it got iced over.. so you knew if the ice was bad or not.
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80gig red mk2 -- 080000125
(No, I don't actually hate Alan Cox)