"They looked for studies that had assessed the impact of speed cameras on speeding, road crashes, crashes causing injury and fatalities. After searching available literature, they identified 35 relevant studies. “While there is variation in the results, the overall finding is clear – speed cameras do reduce injuries and deaths,” said lead researcher Cecilia Wilson of the UQ Centre on National Research on Disability and Rehabilitation Medicine (CONROD). Compared with controls, the average speed fell as did the percentage of vehicles that exceeded local speed limits. The numbers of crashes in the areas of the cameras also fell, as did the numbers of people killed or injured."