The most complete study of the correlation of accidents and the use of red light cameras. It closely examined every accident report filed over a ten year period (including several years before and after cameras were installed). It found the cameras provided no benefit.

2.4mb PDF File

The results of this study suggest that the installation of the RLC at these sites did not provide any reduction in accidents, rather there has been increases in rear end and adjacent approaches accidents on a before and after basis and also by comparison with the changes in accidents at intersection signals.