Speed cameras for the prevention of road traffic injuries and deaths

Wilson, Cecilia, Willis, harlene, Hendrikz, Joan K., Le Brocque, Robyne and Bellamy, Nicholas (2010) Speed cameras for the prevention of road traffic injuries and deaths. Cochrane Database of Systematic Reviews, 2010 11: 1-73. doi:10.1002/14651858.CD004607.pub4

Author Wilson, Cecilia
Willis, harlene
Hendrikz, Joan K.
Le Brocque, Robyne
Bellamy, Nicholas
Title Speed cameras for the prevention of road traffic injuries and deaths
Journal name Cochrane Database of Systematic Reviews   Check publisher's open access policy
ISSN 1469-493X
Publication date 2010
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1002/14651858.CD004607.pub4
Volume 2010
Issue 11
Start page 1
End page 73
Total pages 73
Place of publication Oxford, United Kingdom
Publisher John Wiley & Sons
Collection year 2011
Language eng
Abstract It is estimated that by 2020, road traffic crashes will have moved from ninth to third in the world ranking of burden of disease, as measured in disability adjusted life years. The prevention of road traffic injuries is of global public health importance. Measures aimed at reducing traffic speed are considered essential to preventing road injuries; the use of speed cameras is one such measure. To assess whether the use of speed cameras reduces the incidence of speeding, road traffic crashes, injuries and deaths. We searched the following electronic databases covering all available years up to March 2010; the Cochrane Library, MEDLINE (WebSPIRS), EMBASE (WebSPIRS), TRANSPORT, IRRD (International Road Research Documentation), TRANSDOC (European Conference of Ministers of Transport databases), Web of Science (Science and Social Science Citation Index), PsycINFO, CINAHL, EconLit, WHO database, Sociological Abstracts, Dissertation Abstracts, Index to Theses. Randomised controlled trials, interrupted time series and controlled before-after studies that assessed the impact of speed cameras on speeding, road crashes, crashes causing injury and fatalities were eligible for inclusion. We independently screened studies for inclusion, extracted data, assessed methodological quality, reported study authors' outcomes and where possible, calculated standardised results based on the information available in each study. Due to considerable heterogeneity between and within included studies, a meta-analysis was not appropriate. Thirty five studies met the inclusion criteria. Compared with controls, the relative reduction in average speed ranged from 1% to 15% and the reduction in proportion of vehicles speeding ranged from 14% to 65%. In the vicinity of camera sites, the pre/post reductions ranged from 8% to 49% for all crashes and 11% to 44% for fatal and serious injury crashes. Compared with controls, the relative improvement in pre/post injury crash proportions ranged from 8% to 50%. Despite the methodological limitations and the variability in degree of signal to noise effect, the consistency of reported reductions in speed and crash outcomes across all studies show that speed cameras are a worthwhile intervention for reducing the number of road traffic injuries and deaths. However, whilst the the evidence base clearly demonstrates a positive direction in the effect, an overall magnitude of this effect is currently not deducible due to heterogeneity and lack of methodological rigour. More studies of a scientifically rigorous and homogenous nature are necessary, to provide the answer to the magnitude of effect.
Keyword Accident Prevention [instrumentation; methods]
Accidents, Traffic [prevention & control statistics & numerical data]
Controlled Clinical Trials
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes CD004607

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Official 2011 Collection
School of Medicine Publications
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Created: Wed, 15 Dec 2010, 15:19:35 EST by Chesne McGrath on behalf of Medicine - Royal Brisbane and Women's Hospital