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IIHS News | July 28, 2016Subscribe

Turning off red light cameras costs lives, new research shows

Ruckersville, Va. — Red light camera programs in 79 large U.S. cities saved nearly 1,300 lives through 2014, researchers from the Insurance Institute for Highway Safety have found. Shutting down such programs costs lives, with the rate of fatal red-light-running crashes shooting up 30 percent in cities that have turned off cameras.

"We know we have a problem: people dying at signalized intersections because of people running red lights," IIHS President Adrian Lund said Thursday as he presented the new research at a red-light-camera forum hosted by the Institute. "We know red light cameras are part of the solution."

Adrian Lund

Adrian Lund,
IIHS president

Melissa Wandall

Melissa Wandall,
president of the National Coalition for Safer Roads


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 are occupants of other vehicles, passengers in the red-light-running vehicles, pedestrians or bicyclists.

Automated enforcement deters red light running. While traditional police enforcement can help, there aren't enough resources to station officers at every intersection. Cameras increase the odds that violators will get caught, and well-publicized camera programs discourage would-be violators from taking those odds.

Although surveys have found strong support for red light cameras in communities that have them, opposition from a vocal minority has led some jurisdictions to shut off their cameras. While programs are still being launched in some places, the total number of communities with red light cameras fell to 467 in 2015 from a peak of 533 in 2012.

Supporting effective enforcement

Thursday's forum, held at the IIHS Vehicle Research Center, was organized to support red light camera programs by focusing on best practices. Representatives of law enforcement and municipal and state governments, as well as highway safety advocates and researchers, spoke.

Many speakers emphasized the importance of organizing camera programs so that the public understands their value as a safety tool, not as a revenue generator.

One way to do that is to keep camera revenues separate from the general fund and dedicate them to traffic safety. Several speakers also cited the importance of consistent data collection and transparency.

As part of the day's events, IIHS conducted a demonstration crash that recreated a real-life red-light-running crash in which a driver was severely injured. In the 2012 crash, the driver of a 2010 Ford F-150 ran a red light in Yuma, Ariz., and collided with a 2007 Chrysler Sebring as it was turning left. The pickup was moving at 48 mph as it struck the sedan. The injuries to the Sebring's driver included a concussion and pelvis and rib fractures.

Building on years of research

The forum builds on years of research demonstrating the effectiveness of red light cameras. Earlier studies showed that red light camera enforcement leads to declines in red-light-running violations and crashes at camera-equipped intersections, as well as nearby spillover locations.

A 2011 IIHS study found that in large cities with red light camera programs during 2004-08, there were substantial decreases in the per capita rates of both fatal red-light-running crashes and fatal crashes of all types at intersections with traffic signals.

The new study updates that analysis, using a more rigorous design, a larger number of cities and a longer study period. It also looks at the effect of ending camera programs, something not previously studied.

A 2010 Ford F-150 strikes a 2007 Chrysler Sebring in a demonstration crash that recreated a real-life red-light-running collision. In the real crash, which occurred in Yuma, Ariz., in 2012, the Sebring's driver was severely injured.


In cities that turned on red light cameras

Down arrow

21% fewer
fatal red light running crashes
per capita

Down arrow

14% fewer
fatal crashes of all types per capita at signalized intersections

than would have occurred without cameras


In cities that turned off red light cameras

Up arrow

30% more
fatal red light running crashes
per capita

Up arrow

16% more
fatal crashes of all types per capita at signalized intersections

than would have occurred with cameras


In cities that turned on red light cameras:

  • 21% fewer fatal red light running crashes per capita and
  • 14% fewer fatal crashes of all types per capita at signalized intersections

than would have occurred without cameras


In cities that turned off red light cameras:

  • 30% more fatal red light running crashes per capita and
  • 16% more fatal crashes of all types per capita at signalized intersections

than would have occurred with cameras

IIHS researchers looked at the 57 cities of 200,000 or more people that activated cameras between 1992 and 2014 and didn't shut them off. They compared the trends in annual per capita fatal crash rates in those cities with the trends in 33 cities that never had cameras. After accounting for the effects of population density and unemployment rates, the researchers found there were 21 percent fewer fatal red-light-running crashes per capita in cities with cameras than would have occurred without cameras and 14 percent fewer fatal crashes of all types at signalized intersections.

As expected, the cameras have their biggest effect on red-light-running crashes. However, the analysis shows they reduce other types of fatal intersection crashes as well. Drivers may be more cautious in general when they know there are cameras around. In addition, red-light-running fatalities may be undercounted.

When applied to all 57 cities, as well as 22 cities that started and ended camera programs, the lower intersection crash rate translates into 1,296 lives saved during the years the cameras were operational.

The second part of the study looked at 14 cities that ended their camera programs between 2010 and 2014. The researchers compared trends in annual crash rates in those cities with trends in crash rates in 29 cities in the same regions that continued their camera programs. The fatal red-light-running crash rate was 30 percent higher in cities that turned off cameras than it would have been if the cameras remained on. The rate of fatal crashes at signalized intersections was 16 percent higher.

The 16 percent increase translates into an estimated 63 deaths that would have been prevented in the 14 cities if they had not turned off their cameras.

Commenting on the finding during the forum, Melissa Wandall, president of the National Coalition for Safer Roads, said she would point to those 63 lives lost when confronting politicians who want to dismantle camera programs. "How can you turn away from something that's saving lives?" she asked.

Wandall became a red-light-camera advocate after her husband was killed by a red light runner in 2003, two weeks before the birth of their first child.

"My goal has always been to drive down heartache," she said. "It's real every day that I watch my daughter grow. Even 12 years later, I know what she's missing."

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