The study was carried out by the University of Queensland in Australia, and scientists looked at local research from Australia, the United States, Canada, Germany, Denmark, Finland, Britain, Hong Kong, the Netherlands, New Zealand and Norway.
Average speeds were cut by between 1-15 percent, and between 14-65 percent drops were noted in vehicles exceeding local speed limits.
Crashes in the areas covered by speed cameras fell by 8-49 percent, and fatal or serious injuries crashes declined by 11-44 percent.
The researchers said that systems which monitor average speed over a predetermined distance, called road section control, have the potential to further influence speeding behaviour.
