Mimsy Were the Borogoves

Editorials: Where I rant to the wall about politics. And sometimes the wall rants back.

Red light cameras increase accident rates

Jerry Stratton, March 13, 2008

Radley Balko summarizes a University of South Florida study on the safety of red light cameras. The summary: they reduce safety.

But what about those studies that show decreases in accidents after red light cameras are installed? They tend to be funded by people who want that result, and so they cut corners to get the “right” result:

One of those flawed studies credited red light cameras for downward trends in intersection injuries that began long before red light cameras were actually installed. Others lumped continuing decreases in injuries at intersections without red light cameras with actual increases in injuries at the considerably fewer intersections with cameras. They’d then come up with conclusions such as, “our intersections are safer since we installed red light cameras,” taking care to use words like “since” instead of “because.”

Balko also notes that the study doesn’t address the “temptation among some city governments to actually shorten yellow lights at camera-monitored intersections to increase revenue, despite well-documented research showing that shortening yellows is pretty much guaranteed to cause more accidents.”

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