Reductions in injury crashes associated with red light camera enforcement in oxnard, california.
OBJECTIVE
This study estimated the impact of red light camera enforcement on motor vehicle crashes in one of the first US communities to employ such cameras-Oxnard, California.


METHODS
Crash data were analyzed for Oxnard and for 3 comparison cities. Changes in crash frequencies were compared for Oxnard and control cities and for signalized and nonsignalized intersections by means of a generalized linear regression model.


RESULTS
Overall, crashes at signalized intersections throughout Oxnard were reduced by 7% and injury crashes were reduced by 29%. Right-angle crashes, those most associated with red light violations, were reduced by 32%; right-angle crashes involving injuries were reduced by 68%.


CONCLUSIONS
Because red light cameras can be a permanent component of the transportation infrastructure, crash reductions attributed to camera enforcement should be sustainable.
Retting
Richard A
RA
Insurance Institute for Highway Safety, Arlington, Va 22201, USA. rretting@iihs.org
Kyrychenko
Sergey Y
SY
D000063:Accidents, Traffic / Q000145:classification / Q000517:prevention & control* / Q000706:statistics & numerical data*; D001334:Automobile Driving / Q000331:legislation & jurisprudence*; D002140:California / Q000453:epidemiology; D035061:Control Groups; D006801:Humans; D035846:Law Enforcement; D016365:Liability, Legal; D010781:Photography; D015397:Program Evaluation; D012044:Regression Analysis; D040242:Risk Reduction Behavior; D011049:Social Control Policies; D014947:Wounds and Injuries / Q000453:epidemiology / Q000517:prevention & control