Bellevue traffic map

Everybody knows that the Washington Department of Transportation web site has a detailed traffic map, updated in real-time to show how long your commute will be.  That's nice if you take the freeways, but what about the side streets?  I just found out that the City of Bellevue has a network of road sensors and traffic cameras that let you see at a street level what the traffic is:

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Can't wait to try this the next time I see the freeways covered in black clog.