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

  • January 25, 2012
    US congestion costs continue to rise
    The 2010 Urban Mobility Report, published by the Texas Transportation Institute at Texas A&M University, concludes that after two years of slight declines in overall traffic congestion - attributable to the economic downturn and high fuel prices - leading indicators suggest that as the economy rebounds, traffic problems are doing the same. While 2008 was the best year for commuters in at least a decade, the problem again began to grow in 2009.
  • July 29, 2016
    Turning off red light cameras costs lives, new research shows
    Red light camera programs in 79 large US cities saved nearly 1,300 lives through 2014, researchers from the Insurance Institute for Highway Safety (IIHS) have found. Shutting down such programs has cost lives, with the rate of fatal red-light-running crashes shooting up 30 per cent in cities that have turned off cameras. Red-light-running crashes caused 709 deaths in 2014 and an estimated 126,000 injuries. Red light runners account for a minority of the people killed in such crashes. Most of those killed
  • May 18, 2012
    New framework to plan traffic routing in no-notice disasters
    The Mineta Transportation Institute has released its newest peer-reviewed research report, A Framework for Developing and Integrating Effective Routing Strategies within the Emergency Management Decision-Support System. It describes the modelling, calibration, and validation of a multi-modal traffic-flow simulation of the San Jose, California, downtown network. It also examines various evacuation scenarios and first-responder routings to assess strategies that would be effective during a no-notice disaster.
  • December 7, 2015
    Report analyses effects of non-drivers on self-driving cars
    The University of Michigan Transportation Research Institute has published a new report which analyses the expected changes in the amount of driving and trip-length distributions by personal vehicles, should completely self-driving vehicles become widely available. The analysis is based on two key observations: the large percentage of young adults between 18 and 39 years of age who currently do not have a driver’s licence; a recent survey which provides information about the reasons for not having a driv