Investigating Underage Alcohol Intoxicated Driver Crash Patterns

Despite the zero tolerance and minimum legal drinking age (MLDA) laws since 1999, crashes caused by underage drinking drivers have occurred every year in the U.S., which is a huge concern of roadway safety. This study utilizes nine years (2010 to 2018) of at-fault underage (aged 15 to 20 years) alcohol-intoxicated driver crashes in Louisiana to investigate the hidden crash attribute patterns by applying multiple correspondence analysis (MCA). MCA, an exploratory multivariate analysis technique, identifies systematic associations among categories of qualitative variables rather than recognizing the effect of a single factor on the response variable. The results exhibit the capability of MCA in discovering the meaningful combination clouds of crash contributory factors from a complex multidimensional dataset. Factors such as distraction, restraint usage, crash time, day of week, lighting condition, weather, road geometry, and posted speed limit make significant contributions to underage alcohol-involved driver crashes. Moreover, nine meaningful clouds reveal associations like fatal crashes of unrestrained drivers on high-speed curve roadway segments at dark with no streetlights, late-night crashes while performing additional tasks on cell phones and single vehicle crashes with moderate injuries in light trucks. The collective association of driver, environment, and road-related factors identified in this study can help highway safety experts in developing effective strategies to reduce underage drinking crashes.


  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 20p

Subject/Index Terms

Filing Info

  • Accession Number: 01764225
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-03375
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:22AM