Christopher N Morrison1, Jason Ferris2, Douglas J Wiebe3, Corinne Peek-Asa4, Charles C Branas5. 1. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York; Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia. Electronic address: cm3820@cumc.columbia.edu. 2. Centre for Health Services Research, The University of Queensland, Woolloongabba, Queensland, Australia. 3. Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania. 4. Injury Prevention Research Center, College of Public Health, University of Iowa, Iowa City, Iowa. 5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York.
Abstract
INTRODUCTION: Roadside sobriety checkpoints are an intervention in which law enforcement officers stop passing vehicles to check whether drivers are impaired. There is clear evidence that a program of roadside sobriety checkpoints is an effective approach to reducing alcohol-involved motor vehicle crashes, likely because of general deterrent effects across the entire population of drivers. The aim of this study is to assess the duration of time over which individual roadside sobriety checkpoints are associated with alcohol-involved motor vehicle crashes, within the context of a broader checkpoint program. METHODS: In August 2018, the authors accessed incident-level data for alcohol-involved motor vehicle crashes and roadside sobriety checkpoints for the City of Los Angeles, California, 2013-2017. Counts of crashes and checkpoints were computed within three different temporal units: days (n=1,826), weeks (n=260), and months (n=60). The number of checkpoints were then calculated at different lagged periods (up to 7 days, up to 4 weeks, and up to 3 months). Autoregressive integrated moving average analyses related counts of checkpoints over these lagged periods to subsequent crashes. RESULTS: Fewer alcohol-involved motor vehicle crashes occurred when there were more roadside sobriety checkpoints over the previous 4 days, 5 days, 6 days, 7 days, and 1 week. CONCLUSIONS: Individual roadside sobriety checkpoints affected alcohol-involved motor vehicle crashes in Los Angeles, California for approximately 1 week. The temporal configuration of individual checkpoints is an important consideration when designing an overall roadside sobriety checkpoint program.
INTRODUCTION: Roadside sobriety checkpoints are an intervention in which law enforcement officers stop passing vehicles to check whether drivers are impaired. There is clear evidence that a program of roadside sobriety checkpoints is an effective approach to reducing alcohol-involved motor vehicle crashes, likely because of general deterrent effects across the entire population of drivers. The aim of this study is to assess the duration of time over which individual roadside sobriety checkpoints are associated with alcohol-involved motor vehicle crashes, within the context of a broader checkpoint program. METHODS: In August 2018, the authors accessed incident-level data for alcohol-involved motor vehicle crashes and roadside sobriety checkpoints for the City of Los Angeles, California, 2013-2017. Counts of crashes and checkpoints were computed within three different temporal units: days (n=1,826), weeks (n=260), and months (n=60). The number of checkpoints were then calculated at different lagged periods (up to 7 days, up to 4 weeks, and up to 3 months). Autoregressive integrated moving average analyses related counts of checkpoints over these lagged periods to subsequent crashes. RESULTS: Fewer alcohol-involved motor vehicle crashes occurred when there were more roadside sobriety checkpoints over the previous 4 days, 5 days, 6 days, 7 days, and 1 week. CONCLUSIONS: Individual roadside sobriety checkpoints affected alcohol-involved motor vehicle crashes in Los Angeles, California for approximately 1 week. The temporal configuration of individual checkpoints is an important consideration when designing an overall roadside sobriety checkpoint program.
Authors: Gwen Bergen; Adesola Pitan; Shuli Qu; Ruth A Shults; Sajal K Chattopadhyay; Randy W Elder; David A Sleet; Heidi L Coleman; Richard P Compton; James L Nichols; John M Clymer; William B Calvert Journal: Am J Prev Med Date: 2014-05 Impact factor: 5.043
Authors: Christopher N Morrison; Muhire Kwizera; Qixuan Chen; Cheneal Puljevic; Charles C Branas; Douglas J Wiebe; Corinne Peek-Asa; Kirsten M McGavin; Shellee J Franssen; Vy K Le; Michael Keating; Frances M Williams; Jason Ferris Journal: Alcohol Clin Exp Res Date: 2021-03-28 Impact factor: 3.928