Speed cameras prevent collisions and casualties.

Speed cameras are effective in reducing the frequency of road traffic collisions and related casualties. Systematically searching for the available evidence, Pilkington and Kinra found no randomised controlled trials, but 14 observational studies addressed the topic and fulfilled the inclusion criteria. Although inappropriate for a meta-analysis, these studies consistently provided evidence favouring speed cameras' effectiveness. Reductions ranged widely across the studies for all outcomes—collisions (5%-69%), injuries (12%-65%), and deaths (17%-71%). (Author/publisher) See also C 30618 fo.