The Effectiveness of Automated and Manned Traffic Enforcement

ABSTRACT This study adds to the current debate on speeding and speed enforcement by examining the differential impacts of automated and manned speed enforcements on motor vehicle crashes using data from the Australian State of Queensland. We found that while manned enforcement has a significant impact on both total and serious crashes, automated enforcement only has an effect on total crashes. Our evidence also suggests that whereas manned enforcement provides specific deterrence targeted at the high-risk drivers, automated enforcement provides a general deterrence effect on a broad spectrum of the driving population, which may partially explain the differential effects observed.

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