The effect of speed cameras on the incidence of road traffic accidents

  • Published: 1st Civil and Environmental Engineering Student Conference, 2012
  • Authors: T. K. Utley
  • Date Added: 18 Mar 2013
  • Last Update: 18 Mar 2013
  • Format: pdf


The aim of this research was to analyze the effect of Speed Limit Enforcement Cameras (SLECs) nationwide across the whole of England and try to categorically prove what effect they have by removing as many sources of confounding data as possible to create a reliable model of how effective the wide variety of cameras are at reducing RTIs.


Literature review and statistical analysis of accident and speed camera location data.

Key Findings:

  • It is clear that speed cameras placed on major roads are more effective at reducing RTIs than cameras on minor roads - installing cameras on minor roads appear to have a limited effect.

  • Cameras installed on roads with speed limits above 40 mph are also more effective at reducing fatal RTIs.

  • As expected, the effectiveness of camera reduces as the distance from its installation point increases.

  • Overall, the cameras reduced all types of RTI by around 30 per cent, which varies significantly depending on class and zone of influence considered. However, it is certain that their introduction has resulted in a negative effect on the occurrence of RTIs in all cases.


Safety camera effectiveness


A good academic review attempting to strip away the sources of confounding data to give a definitive answer. No definition of ‘major’ and ‘minor’ roads given.