Red light camera enforcement programs in 14 cities in the U.S. reduced the per capita rate of fatal red light running crashes by 24 percent.
Results from 14 large cities (population 200,000 or more) across the United States
A before-after analysis of the relationship between red light camera enforcement programs on per capita fatal crash rates at signalized intersections examined data from 14 large cities (defined as having a population of 200,000 or more) in the United States. These cities had red light enforcement programs from 2004-08 but not from 1992-96. These cities were also compared to similar cities that did not have camera enforcement in either period. The analysis used Poisson regression to determine per capita fatality rates as a function of the presence of a red light enforcement program, land area, and population density.
Overall, there was a decline in fatal red light running crashes in cities with and in cities without enforcement programs. However, the cities with red light camera enforcement programs had a larger decline than those without camera enforcement (35 versus 14 percent).
Cities with camera enforcement had a 24 percent lower rate of fatal red light running crashes during 2004-08 relative to what it would have been without camera enforcement. Further, the rate of all fatal crashes at signalized intersections in cities with enforcement programs was 17 percent lower than what it would have been without camera enforcement.
These results demonstrate that red light camera enforcement programs produce significant safety benefits by not only reducing fatal crashes from red light running but also by reducing the number of fatal crashes of all types at signalized intersections.
Author: Hu, Wen, McCartt, Anne T., Teoh, Eric R.
Published By: Insurance Institute for Highway Safety
Source Date: February 2011URL: http://www.iihs.org/research/topics/pdf/r1151.pdf
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