http://www.calgaryherald.com/news/Tr...686/story.html
Arizona implemented speed on green cameras a while ago. It has reduced speeding and dangerous collisions but has increased rear-end collisions.
Quote:
But when other jurisdictions ask for advice on the equipment, Porell warns it can increase the amount of rear-end collisions as people stop suddenly to avoid speeding through intersections, only to be rear-ended by an inattentive driver.
Rear-end crashes are less dangerous than angle crashes so it's a trade-off, said [Arizona traffic engineer Paul] Porell.
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