We found that fixed speed cameras were generally located in areas with high road safety risk. Likewise, safety cameras that enforced speed limits were initially placed at high risk sites. However as all safety cameras will now enforce speed, RTA no longer uses evidence of a speeding problem to select these sites. Overall, total crashes and injuries each fell 26 per cent, and fatalities fell by more than two-thirds, in the three years after the installation of fixed speed camera. Long term trends show that these reductions have been maintained, the average number of speeding fines per fixed and safety cameras declines over time and fixed and safety speed cameras were located in areas with high road safety risk.
Parliamentary reference - Report number #215 - released 27 July 2011