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Accident Analysis & Prevention
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Accident Analysis & Prevention
Article . 2014 . Peer-reviewed
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Prevalence of alcohol-impaired drivers based on random breath tests in a roadside survey in Catalonia (Spain)

Authors: Alcañiz, Manuela; Guillén, Montserrat; Sánchez Moscona, Daniel; Santolino, Miguel; Llatje, Oscar; Lluis, Ramon;

Prevalence of alcohol-impaired drivers based on random breath tests in a roadside survey in Catalonia (Spain)

Abstract

Sobriety checkpoints are not usually randomly located by traffic authorities. As such, information provided by non-random alcohol tests cannot be used to infer the characteristics of the general driving population. In this paper a case study is presented in which the prevalence of alcohol-impaired driving is estimated for the general population of drivers. A stratified probabilistic sample was designed to represent vehicles circulating in non-urban areas of Catalonia (Spain), a region characterized by its complex transportation network and dense traffic around the metropolis of Barcelona. Random breath alcohol concentration tests were performed during spring 2012 on 7596 drivers. The estimated prevalence of alcohol-impaired drivers was 1.29%, which is roughly a third of the rate obtained in non-random tests. Higher rates were found on weekends (1.90% on Saturdays and 4.29% on Sundays) and especially at night. The rate is higher for men (1.45%) than for women (0.64%) and it shows an increasing pattern with age. In vehicles with two occupants, the proportion of alcohol-impaired drivers is estimated at 2.62%, but when the driver was alone the rate drops to 0.84%, which might reflect the socialization of drinking habits. The results are compared with outcomes in previous surveys, showing a decreasing trend in the prevalence of alcohol-impaired drivers over time.

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Spain
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Keywords

Adult, Male, Automobile Driving, Adolescent, Traffic flow, Traffic engineering, Young Adult, Humans, Drinking and traffic accidents, Aged, Ethanol, Data Collection, Middle Aged, Consum d'alcohol i accidents de circulació, Cross-Sectional Studies, Breath Tests, Spain, Circulació, Female, Alcoholic Intoxication, Enginyeria del trànsit

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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