“After outlining the statistical flaws in the model used by IIHS, the USF researchers applied more rigorous statistical techniques to the original IIHS data. The revised analysis considered 31 cities without cameras that had fatal red light running crash rates equal to 13 camera cities in the before period (Phoenix was excluded as an outlier). With these changes, the purported benefits of cameras disappeared.  The USF researchers note that their findings are consistent with a number of methodologically sound and independent analyses of red light camera results.”

http://www.thenewspaper.com/news/43/4304.asp

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