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Old 07-10-18, 02:52 PM
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Originally Posted by autonomy View Post
These show up in numbers in the western suburbs, lots of them on Monument St in Concord, which is hugely popular, have a high correlation with the Strava heat map, show up shortly before and at intersections, and sometimes - as in the picture - point in different directions. So I'm thinking they're route markers. I haven't tried searching Google or anything, figured someone in here might know.
Aha . . . I think I found your answer:

Charles River Wheelers:
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