Detailed Investigation of Crash Risk Reduction Resulting from Red Light Cameras in Small Urban Areas;Final report

摘要

This paper analyzes the impact of red-light cameras (RLCs) on crashes at signalized intersections. It examines total crashes and also breaks crashes into categories based on both severity (e.g. causing severe injuries or only property damage) and by type (e.g. angle, rear end). Prompted by criticism of the simplistic methods and small data sets used in many studies of red light cameras, we relate the occurrence of these crashes to the characteristics of signalized intersections, presence or absence of RLC, traffic, weather and other variables. Using a large data set including 27 months before the introduction of RLCs, we analyze reported accidents occurring near 302 intersections over a 45 month period, for a total of 13,590 observations.