Evaluation of red light camera enforcement in Oxnard, California

Red light cameras are increasingly being used to supplement police efforts to enforce against noncompliance with traffic signals-a substantial contrib uting factor in urban motor vehicle crashes. Camera enforcement is intended to modify driver behavior through both general deterrence and punishment o f individual violators. A before/after quasi-experimental design with contr ols was employed to evaluate the influence of a red light camera enforcemen t program on red light violation rates in the city of Oxnard, CA. A total o f 14 intersections (nine camera sites, three non-camera sites, and two cont rol sites) were studied. Overall, the red light violation rate was reduced approximately 42% several months after the enforcement program began. Incre ases in driver compliance with red lights were not limited to the camera-eq uipped intersections but spilled over to nonequipped intersections as well. Results of public opinion surveys conducted approximately 6 weeks before, 6 weeks after, and 6 months after the camera enforcement program began indi cated that nearly 80% of Oxnard residents support using red light cameras a s a supplement to police efforts to enforce traffic signal laws. (C) 1999 E lsevier Science Ltd. All rights reserved.