How effective is street lighting in preventing road traffic crashes, injuries and fatalities?
No randomised controlled trials were identified - the review was based on the results of 16 controlled before-after studies. The methodological quality of the trials was generally poor, and the risk of bias was judged to be high. Fourteen of the 16 studies were able to contribute data to the meta-analysis.
Road traffic crashes are a major cause of death and injury, especially in low and middle-income countries. Worldwide, each year over 1 million people are killed and some 10 million people are permanently disabled in traffic crashes. Furthermore, it is estimated road traffic injuries will have risen from ninth to third in world disease burden rankings by 2020, and will account for 2.3 million deaths globally.