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原文传递 Traffic Safety Facts 2011 Data: State Alcohol-Impaired Driving Estimates.

题名：	Traffic Safety Facts 2011 Data: State Alcohol-Impaired Driving Estimates.
关键词：	Alcohol Safety; Children; Drinking Drivers; Estimates; Fatalities; Graphs(charts); Impaired Drivers; Motor Vehicle Accidents; Statistical Data; Tables(data); Traffic Safety
摘要：	This fact sheet contains estimates of driver alcohol involvement in fatal crashes for the United States and individually for the 50 States, the District of Columbia, and Puerto Rico in 2011. For comparison, data from 10 years ago (2002) are also presented. These estimates are based on data from NHTSAfs Fatality Analysis Reporting System (FARS). Unfortunately, known blood alcohol concentration (BAC) test results are not available for all drivers involved in fatal crashes. Missing data can result for a number of reasons, the most frequent of which is that people are not always tested for alcohol. To address the missing data issue, NHTSA uses a statistical model called gmultiple imputationh to estimate the blood alcohol concentration (BAC) of the driver at the time of the crash. The statistical model is based on important characteristics of the crash including crash factors (e.g., time of day, day of week, type of crash, location); vehicle factors (e.g., vehicle type and role in the crash); and person factors (e.g., age, sex, restraint use, previous driving violations); and most importantly, the subjective assessment of the police officer at the scene of the crash as to whether alcohol was involved or not.
报告类型：	科技报告