This study was conducted by a team of researchers at the Institute of Transportation Studies, University of California at Berkeley, with funding from the California Office of Traffic Safety. Ted Chira-Chavala directed the study, coordinated the write-up of the final report, and wrote many chapters. Douglas Cooper was the key researcher, who performed the literature review, worked with key personnel of Upland Police Department to acquire essential data for the evaluation, analyzed the data, and contributed significantly to all chapters. David Gillen performed all time-series analyses and...