Placing speed cameras on roads reduces the number of road traffic injuries and deaths in the state of Queensland in Australia, according to a new study.

The study conducted by University of Queensland and Queensland Institute of Medical Research notes that speed cameras are one of the measures authorities can use to reduce traffic speed in order to prevent road injuries.

The study explored whether the speed cameras are effective by examining 35 studies that had assessed the impact of speed cameras on speeding, road crashes, crashes causing injury and fatalities.

Compared with controls, the roads that have no cameras, the average speed fell as did the percentage of vehicles that exceeded local speed limits.

The number of crashes in areas with cameras also fell, as did the numbers of people killed or injured.

The report, however, claims the researched studies were carried out in low-income countries, where most road traffic crashes occur, and called for further research in these settings.