Every year the local police do a week-long enforcement pushes. It normally means they give a bunch of cyclists warnings and ignore cars running red lights. Maybe with all the talk about car/bike incidents they chose to do another one. I thought they already did their safety event for the year.
Words of advice: Stop at the signs for 3 seconds. They are probably timing you. Definitely do not say “See you next year!” to the officers. They don’t seem to like it. 
But seriously…. I am happy that they are doing some enforcement. I hope they do some for cars too.
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I am here: http://maps.google.com/maps?ll=38.860507,-77.199419