RED LIGHT CAMERAS - ANOTHER POSSIBILITY

Based on local talk radio shows and some newspaper reading, red light cameras are unpopular and the data on their effectiveness in preventing accidents is mixed at best.  In addition to the financial incentive that local communities have in them, perhaps there's a more invasive reason, as Susie Madrak suggests:

Red Light Camera Data Doesn't Require Judicial Oversight
By Susie Madrak
June 29, 2013 12:30 PM
Crooks & Liars

I was talking to one of my neighbors about why the city is putting a red light camera at an intersection near our street, when it wasn't a problem area. She said it didn't make sense; I said since it was the last intersection before the bridge to New Jersey, they were probably collecting information to track cars. She said I was "crazy" and "paranoid." (I get that a lot these days.)
Turns out the EFF and the ACLU are wondering, too. They've filed a lawsuit: