TEENAGE DRIVER CRASHES -- CARRYING PASSENGERS AS A RISK FACTOR - PowerPoint PPT Presentation

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TEENAGE DRIVER CRASHES -- CARRYING PASSENGERS AS A RISK FACTOR

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  1. TEENAGE DRIVER CRASHES -- CARRYING PASSENGERS AS A RISK FACTOR Li-Hui Chen, MS, Ph.D. Assistant Scientist JohnsHopkins School of Public Health Center for Injury Research & Policy

  2. Readings • Carrying passengers as a risk factor for crashes fatal to 16- and 17-year-old drivers • Reducing fatal crash risk among teenaged drivers • Graduated licensing: a blueprint for North America

  3. Learning Objectives: • Understand the scope of MV injury for teenage drivers • Learn about the risk to teenage drivers of carrying passengers • Learn about the GDL system

  4. Performance Goals: • Be able to describe the importance of MV injury for teenagers • Be able to describe the risk of carrying passengers for teen driver • Be able to describe the ideal GDL system

  5. Background For U.S. teens, MV crashes • are the leading cause of death, accounting for 36% of all deaths • have a much higher rate than for older drivers

  6. Background--Haddon Matrix

  7. Background—GDL System • Lets teen drivers earn experience step by step and in a less risky environment

  8. Background--Central framework for GDL Three stages • Supervised learner’s period • Intermediate license • Full license

  9. Background—Current GDL adoption in the U.S. • 30 states had adopted full graduated licensing systems • 14 states had some passenger restrictions

  10. Methods--Data • FARS: All fatal crashes in the U.S. • GES: Sample of police reported crashes in the U.S. • NPTS: Survey of travel patterns in the U.S.

  11. Methods--Analysis • Risk of death per 10 million trips • Risk of death per 1000 crashes • Relative risk and confidence intervals

  12. Results

  13. Results

  14. Results

  15. Results

  16. Results-Summary • Fatal crash rates for drivers aged 16-17 increased with the number of passengers for both day and night • Crashes are more likely to be fatal in the presence of male, teen, and age 20-29 passengers

  17. Discussion--Possible explanations • Dangerous driving behaviors • Distraction • Alcohol involvement

  18. Discussion--Limitations • Unable to control alcohol • Do not have information on age of passengers in travel pattern

  19. Conclusions Restrictions on carrying passengers should be considered for inclusion in graduated licensing systems for young drivers

  20. Further Studies • Age of passengers • The relationship to alcohol use • Why carrying passengers increases risk