ArticleInjury prevention : journal of the International Society for Child and Adolescent Injury Prevention2019
Impact of automated photo enforcement of vehicle speed in school zones: interrupted time series analysis.
Article in Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
3 citing papers in PubMed.
- Advancing equitable and sustainable urban health.Nature medicine · 2025Review
- Challenges of enforcing cellphone use while driving laws among police in the USA: a cross-sectional analysis.BMJ open · 2021Article
- State-of-the-art review: preventing child and youth pedestrian motor vehicle collisions: critical issues and future directions.Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention · 2021Review
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
objectiveMeasure the impact of automated photo speed enforcement in school zones on motorist speed and speeding violation rates during school travel.
methodsAutomated enforcement cameras, active during school commuting hours, were installed around four elementary schools in Seattle, Washington, USA in 2012. We examined the effect of automated enforcement on motorist speeds and speed violation rates during the citation period (10 December 2012 to 15 January 2015) compared with the 'warning' period (1 November to 9 December 2012). We evaluated outcomes with an interrupted time series approach using multilevel mixed linear regression.
resultsMotorist speed violation rates decreased by nearly half in the citation period compared with the warning period (standardised incident rate ratio 0.53, 95% CI 0.42 to 0.66). The hourly maximum violation speed and mean hourly speeds decreased 2.1 MPH (95% CI -2.88 to -1.39) and 1.1 MPH (95% CI -1.64 to - 0.60), respectively. The impact of automated enforcement was sustained during the second year of implementation.
conclusionAutomated photo enforcement of speed limit in school zones was effective at reducing motorist speed violations and also achieved a significant reduction in mean motorist speed.
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Registered trials
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