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Association between Supervisory Driver Offences and Novice Driver Crashes Post-Licensure
Teresa Senserrick1, Soufiane Boufous, Rebecca Ivers
1The George Institute for International Health, The University of Sydney, Sydney, Australia Department of Aviation, The University of New South Wales, Sydney, Australia.
Summary
Supervised novice drivers whose supervisors had driving offenses showed a higher crash risk. This increased risk was independent of supervisor demographics but lessened by the young driver’s own characteristics.
Area of Science:
- Road safety research
- Traffic psychology
- Driver behavior analysis
Background:
- Novice drivers are at high risk for crashes.
- Supervised driving is a critical phase for developing safe driving habits.
- The role of supervisor's driving history in novice driver outcomes is not well understood.
Purpose of the Study:
- To investigate the association between driving offenses of learner supervisory drivers and subsequent crashes experienced by novice independent drivers.
- To determine if a supervisor's traffic offense record predicts a novice driver's crash risk.
Main Methods:
- Prospective cohort study of 20,822 novice drivers (aged 17-24) in New South Wales, Australia.
- Data collected via online questionnaire on demographics, supervisors, and risk factors.
- Linked to police-reported crashes two years post-licensure.
- Poisson regression analysis used to determine relative risks.
Main Results:
- Novice drivers supervised by individuals with driving offenses had a 35% higher unadjusted risk of crashing (RR=1.35, CI 1.14-1.60).
- This association persisted after adjusting for supervisor demographics (RR=1.37, CI 1.16-1.63).
- The association was not significant when controlling for novice driver demographics and characteristics (RR=1.50, CI 0.83-2.70).
Conclusions:
- Newly-licensed drivers supervised by individuals with traffic offenses face a significantly higher crash risk.
- This elevated risk is independent of supervisor demographics but is influenced by the novice driver's personal characteristics.
- Policy implications for supervised driving requirements, especially when parents act as supervisors, warrant careful consideration.
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