|
|
|
Title: EFFECTS OF SPEED LIMIT ENFORCEMENT CAMERAS ON ACCIDENT RATES
Accession Number: 00965395
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Speed limit enforcement cameras (SLECs) have been in operation in Great Britain since 1991. However, there is still considerable dispute regarding their effectiveness in reducing accident rates. The aim of this research was to analyze the effects of SLECs on accident rates in Cambridgeshire, United Kingdom, using time series data collected over an 11-year period. A time series analysis of the accident data revealed the presence of both trend and seasonality components. A method was developed to remove the influence of these two components from the data and compare mean accident levels before and after installation of the camera. The method was also constructed in such a way that it would be able to distinguish between the actual effects of the camera installation and the effects of regression to the mean. The initial investigation into the effects of SLECs showed an average decrease over sites in the monthly accident frequency by around 18%; a more detailed analysis suggested that the best approximation of the effect of the introduction of a SLEC is a decrease in injury accidents by 31.26%, thus giving clear evidence that SLECs do indeed contribute to a significant decrease in accident numbers.
Supplemental Notes: This paper appears in Transportation Research Record No. 1830, Highway Safety, Traffic Law Enforcement, and Truck Safety.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Hess, SPolak, JPagination: p. 25-33
Publication Date: 2003
Serial: ISBN: 0309085640
Features: Figures
(5)
; References
(5)
TRT Terms: Geographic Terms: Subject Areas: Highways; Safety and Human Factors; I80: Accident Studies
Files: TRIS, TRB, ATRI
Created Date: Nov 4 2003 12:00AM
More Articles from this Serial Issue:
|
