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Originally Posted by Old Yeller
That surprises me, I thought that was pretty common knowledge.
Are there also some sort of sensors on the top of stop lights? Or are they usually traffic cameras?
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I believe those are for emergency vehicles that can trigger a light change in their favour.
There is one at 20th ave and 2nd st NW that allows cyclists to trigger the light, but I've found I need to be fairly animated approaching the intersection. I don't think they are very common.