crashes decreased by 60% at one, increased 100% at two, and increased 175% at the fourth. According to the IIHS, most studies suggest the increase in rear-end collisions decreases once drivers have become accustomed to the new dynamics of the intersection. Some locations experience a decrease in rear-end collisions at intersections with red light cameras over time, for instance, in Los Angeles such collisions fell 4.7% from 2008 to 2009. However, a 2010 analysis by the Los Angeles City Controller found L.A.'s red light cameras hadn't demonstrated an improvement in safety, specifically that of the 32 intersections equipped with cameras, 12 saw more crashes than before the cameras were installed, 4 had the same number, and 16 had fewer crashes; also that factors other than the cameras may have been responsible for the reduced crashes at the 16 intersections. And in Winnipeg, Manitoba, crashes were found to have significantly increased in the years following the deployment of red light cameras. In 2010, Arizona completed a study of their statewide 76 photo enforcement cameras and decided they would not renew the program in 2011; lower revenue than expected, mixed public acceptance and mixed accident data were cited. Nevertheless, the FHWA has concluded that the cameras yielded a positive overall cost benefit due to the reduction in more expensive right-angle injury collisions. Other studies have found a greater crash reduction. For example, a 2005 study of the Raleigh, North Carolina, red light camera program conducted by the Institute for Transportation Research and Education at North Carolina State University found right-angle crashes dropped by 42%, rear-end crashes dropped by 25% and total crashes dropped by 17%. In 2010, the IIHS looked at results of a number of studies and found that red light cameras reduce total collisions and particularly reduce the type of crashes that are especially likely to cause injuries. A 2011 IIHS report concluded that the rate of fatal collisions involving red-light running in cities with a population of 200,000 or greater was 24% lower with cameras than it would have been without cameras. Opinions United States A 2009 Public Opinion Strategies poll which asked, "Do you support or oppose the use of red-light cameras to detect red-light runners and enforce traffic laws in your state's most dangerous intersections?" found 69% support and 29% oppose. A 2012 telephone survey of District of Columbia residents published in the journal Traffic Injury Prevention