Their legality is still questioned in some states. A case was argued before Iowa's Supreme Court only yesterday. But how about their efficacy? Researchers at the University of South Florida Public Health have released a study that shows a significant spike in accidents at intersections that use cameras to catch light runners. Why? Drivers are more likely to slam on their brakes when the signal turns yellow, causing tailgaters to ram into them.
The spike is not insignificant. The USF study focused on Florida, and found that traffic fatalities caused by red-light running were not increasing. In fact, they account for less than 4% of the state's yearly traffic deaths.
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