This research effort expanded on a previous research effort funded by the North Carolina Governor’s Highway Safety Program. The original report, published in December 2004, looked into the safety effects of an automated red-light running (RLR) program in Raleigh, North Carolina. The primary shortcoming of the initial analysis was the limited data set used in the after period: only 5 months of data at 14 intersections. The initial findings indicated that RLR cameras decreased all five collision categories studied: total, RLR-related, angle, rear-end, and injury collisions. This research effort expanded on the data set used in the initial study by including 46 months of after data.