Automated red light enforcement at 11 intersections in Oxnard, California reduced crashes by 7 percent, decreased right-angle crashes by 32 percent, lowered injury crashes by 29 percent, and reduced right-angle injury crashes by 68 percent.
During the first month of operations (June 1997) violators were photographed in Oxnard, but no citations were issued. As required by law, signs were posted at major entrances to the city to inform motorists of red-light camera enforcement, however, issuance of citations did not begin until July 1, 1997. Penalties included a $271 fine and 1 point on the operator's driving record.
A linear regression model was used to determine the trends in total crashes, average crashes, and specific crash types in each city before and after red-light camera enforcement was initiated. An analysis of variance test was used to determine the statistical significance of changes in the number of crashes in Oxnard by considering changes in the crash rate in the control cities.
The results estimated that red light camera enforcement reduced the number of crashes at signalized intersections throughout Oxnard. Crashes at these intersections were reduced by 7 percent, right angle accidents were reduced by 32 percent, injury crashes were reduced by 29 percent, and right angle injury accidents were reduced by 68 percent.
The author vetted the results by examining the possibility that traffic volumes in Oxnard may have shifted from signalized to non-signalized intersections. Based on observations and traffic volume measurements at 12 intersections before and after implementation, the author concluded that a shift in citywide driving patterns was improbable during the study period.
Reductions in Injury Crashes Associated with Red Light Camera Enforcement in Oxnard, California
Author: Retting, Richard A. and Sergey Y. Kyrychenko
Published By: Paper presented at the 80th Annual Transportation Research Board Meeting. Washington, District of Columbia
Source Date: 7-11 January 2001
Average User Rating
Typical Deployment Locations
photo enforcement, red light cameras, red light running, automated enforcement, traffic signals, run red lights, RLR, red light runners, photo-red