Article: What are the black squares on Seattle roadways? Gang signs?(Seattle 911)

One of the black squares in question. (Seattle Department of Transportation photo)

Q: I see these black squares in the middle of the road all over the place and no one seems to know what they are there for. Are they to monitor traffic? Are they some gang's way of marking its territory?

I found four more on Trenton Avenue Southwest in West Seattle just east of the post office driveway the other day. Others are on Aurora Avenue North and Harbor Avenue Southwest.

Can you please ask the Seattle Department of Transportation folks if they know of anything?

A: The markings aren't for a gang's territory, unless you consider the National ...

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