Chicago claims the red-light cameras installed at 190 intersections have greatly improved the safety of both motorists and pedestrians. (Click here for statistics.) In addition to almost $70 million in revenue, though, they also brought tons of negative publicity when an investigation revealed the program involved bribery.

Two years ago, the city began installing speed cameras to enhance the safety of children around schools and parks. According to another investigation, the rules for issuing a ticket are confusing, overly broad, and inconsistent.

This excellent analysis of the cameras' history includes an interview with a resident who unsuccessfully challenged five tickets for parking near a closed playground.

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