Evaluation of speed cameras finds reduction in injury crashes

A before and after study by the Norwegian Institute of Transport Economics, Transportøkonomisk institutt (TOI) of 223 speed cameras that were installed between 2000 and 2010 in Norway found a statistically significant reduction of injury crashes by 22 per cent on road sections between 100 metres upstream and one kilometre downstream of the speed cameras. For killed and severely injured (KSI) and on longer road sections none of the results are statistically significant. However, speed cameras that were i
January 30, 2015 Read time: 2 mins
A before and after study by the Norwegian Institute of Transport Economics, Transportøkonomisk institutt (TOI) of 223 speed cameras that were installed between 2000 and 2010 in Norway found a statistically significant reduction of injury crashes by 22 per cent on road sections between 100 metres upstream and one kilometre downstream of the speed cameras.

For killed and severely injured (KSI) and on longer road sections none of the results are statistically significant. However, speed cameras that were installed in 2004 or later were found to reduce injury crashes and the number of KSI on road sections from 100 m upstream to both one kilometre and three kilometres downstream of the speed cameras. Larger effects were found for KSI than for injury crashes and the effects decrease with increasing distance from the speed cameras.

At the camera sites (100 metres up- and downstream) crash reductions are smaller and non-significant, but highly uncertain and may be underestimated. The study has controlled for trend, volumes, and changes of speed limits and other road characteristics.

Regression to the mean is controlled for by using the Empirical Bayes method.
Enforcement

Related Content

  • TTI study underscores safety benefits of red light cameras
    March 23, 2012
    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
    Read More
  • Speed cameras yield long-term safety benefits, IIHS study shows
    September 2, 2015
    A speed-camera program in a large community near Washington, DC, has led to long-term changes in driver behaviour and substantial reductions in deaths and injuries, a study by the Insurance Institute for Highway Safety (IIHS) shows. Automated speed enforcement is gradually becoming more common around the country but remains relatively rare, with only 138 jurisdictions operating such programs as of last month. According to IIHS, if all US communities had speed-camera programs like the one IIHS studied in
    Read More
  • Deaths up and road safety spending down in England
    July 12, 2012
    Fifty local councils in England saw more than a ten per cent increase in killed and seriously injured (KSI) crash rates between 2010 and 2011, according to an Institute for Advanced Motorists (IAM) analysis of the new road accident figures. The biggest increases in KSI numbers were in St Helens – 62 per cent, Portsmouth – 57 per cent, Stoke on Trent – 57 per cent, and Coventry – 51 per cent. A further 76 councils saw increases in the KSI rate above the national average of two per cent.
    Read More
  • Brake, IAM concerned at government figures on UK drink-drive habit
    August 7, 2015
    Brake, the road safety charity, and the Institute of Advanced Motorists (IAM), have responded to the latest government figures which they say show Britain is still failing to adequately tackle its drink drive problem. A final estimate shows 240 people were killed by drivers over the legal drink drive limit in 2013, while provisional estimates suggest at least that number were killed in 2014. However, the number of people seriously injured in drink drive crashes did fall by eight per cent to 1,100 from 20
    Read More

Highlighted Content