Insurance Industry Proves Accident Rates Declined Equally With or Without Speed Cameras

An Insurance Industry Group is claiming that a study on Montgomery County's speed camera program shows the benefits of speed cameras, even though that study found no difference in accident rate reductions on roads where speed cameras were added compared to roads in a control group without speed cameras.

The study by the Insurance Industry for Highway Safety (IIHS) compared roads in Montgomery County eligible for speed cameras (generally roads with speed limits of up to 35mph) to a set of roads in Fairfax County with comparable speed limits (25-35mph).

The study also wanted to prove the existence of "spillover effects", by comparing a set of roads in Montgomery County with 40mph speed limits to a set of roads in Fairfax County with comparable speed limits. Data from 2004 through 2013 was examined.

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