A practitioner or policy-maker is asking you to guide their decision on whether or not they should implement red light cameras (RLCs) in their city. Of the following options, What is the best answer you can give them?
1) Investing community and police resources in RLCs will reduce various types of traffic crashes, including total crashes involving injuries, and may reduce red light violations, but will also increase rear end crashes.
2) The majority of the studies examined were found to use weak methods which have a risk of bias. Policymakers and practitioners need to use evidence from better quality studies, particularly randomized controlled trials or natural experiments.
3) More high quality empirical studies of RLCs are needed.
4) Overall, the costs of RLC programs tend to outweigh revenue. The potential benefits of a reduction in traffic violations and in some types of injury crashes should be weighed against the increased risk of other crash types.