Skip to main content

TTI study underscores safety benefits of red light cameras

New research claims that red light cameras help to reduce the number of crashes at intersections where they are installed. The study, although limited to Texas, is claimed to be one of the most extensive so far in the US, and researchers say the findings demonstrate that the automated enforcement method offers an effective means of preventing crash-related deaths and injuries. The 69-page report, - Evaluation of Photographic Traffic Signal Enforcement Systems in Texas - which is available at this link, is t
March 23, 2012 Read time: 2 mins
New research claims that red light cameras help to reduce the number of crashes at intersections where they are installed. The study, although limited to Texas, is claimed to be one of the most extensive so far in the US, and researchers say the findings demonstrate that the automated enforcement method offers an effective means of preventing crash-related deaths and injuries.

The 69-page report, - Evaluation of Photographic Traffic Signal Enforcement Systems in Texas - which is available at %$Linker: External 0 0 0 oLinkExternal this link Evaluation of Photographic Traffic Signal Enforcement Systems in Texas false http://tti.tamu.edu/wp/wp-content/uploads/2011/07/Evaluation_of_Photographic_Traffic_Signal_Enforcement_Systems_in_Texas.pdf false false%>, is the result of researchers examining more than 11,000 crash records at the 275 intersections statewide where cameras were in place, and comparing crash frequencies one, two and three years before and after installation of the cameras.

An overall reduction of 633 crashes recorded at those intersections represents an 11 per cent decline statewide. Red light-related crashes dropped by 25 per cent, and right-angle crashes (the most severe type) dropped by 32 per cent. The reductions were seen across the board on all types of roadways, including  business/primary roads, farm-to-market roads, interstate access roads, state highways and US highways.

In addition to assessing the cameras’ effectiveness according to roadway type, researchers also compared crash frequencies at different intervals before and after cameras were installed. The examination showed a 23 per cent drop from one year before to one year after cameras were put into use. The two- and three-year comparisons reflected reductions of 27 per cent and 21 per cent, respectively.

“These findings show clearly that red light cameras offer significant safety benefits,” says Troy Walden, the author of the TTI study. “Most important, they help prevent the most severe and deadly type of intersection crashes.”

According to US federal sources, red light running causes more than 100,000 crashes and 1,000 fatalities every year, and right-angle crashes account for 46 per cent of all intersection-related collisions.

Related Content

  • Automated traffic enforcement – speed or greed?
    December 9, 2015
    US research and education charity Frontier Centre for Public Policy has released Speed or Greed: Does Automated Traffic Enforcement Improve Safety or Generate Revenue?, a study on the effects of automated traffic enforcement (ATE). Report authors Hiroko Shimizu and Pierre Desrochers state that the decline of road fatalities by 58 per cent is largely due to better engineered vehicles, seat belts and other safety measures. Although there is little credible evidence, the report says some ATE supporters a
  • RAC Foundation: UK drivers receive 12 million penalties annually
    October 25, 2017
    Up to 12 million driving license holders receive a penalty notice each year – the equivalent of one every 2.5 seconds; meaning as many as a third (30%) of Britain's 40 million drivers now receive a penalty notice annually. The findings come from the Automated Road Traffic Enforcement: Regulation, Governance and Use - for the RAC Foundation by Dr Adam Snow, a lecturer in criminology at Liverpool Hope University. The penalty notices include the Fixed Penalty Notice (a criminal penalty issued
  • St Louis red light cameras changing driver behaviour
    November 5, 2012
    According to a new analysis of the City of St. Louis' violator-funded red-light safety camera program carried out by safety camera supplier American Traffic Systems (ATS), drivers are adopting safer driving habits by stopping at red lights. As drivers comply with the law, the risk of dangerous red-light running collisions is reduced, and streets become safer for drivers, pedestrians and cyclists. The study reviewed nearly 350,000 red-light running violations issued in the city from the time the program bega
  • US study finds cameras reduce red light running
    January 28, 2013
    The latest research by the US Insurance Institute for Highway Safety (IIHS) found that red light running rates declined at Arlington, Virginia, intersections equipped with cameras. The decreases were particularly large for the most dangerous violations, those happening 1.5 seconds or longer after the light turned red. "This study provides fresh evidence that automated enforcement can get drivers to modify their behaviour," says Anne McCartt, senior vice president for research at IIHS and the study's lead au