Research Papers

Crash responsibility of young novice drivers: What difference does graduated licensing make?

Filename Chipman.pdf
Filesize 69 KB
Version 1
Date added June 6, 2010
Downloaded 2 times/fois
Category 2010 CMRSC XX Niagara
Tags Session 2B
Author/Auteur Mary L. Chipman, Christopher Meaney


Purpose: The effectiveness of Graduated Driver Licensing (GDL) programs has typically been evaluated from changes in crash rates, particularly for young drivers. These rates may be strongly influenced by corresponding changes in exposure; i.e., the amount and type of driving done by drivers with different license restrictions. A different measure, whether the driver is characterized as “driving properly” or “not driving properly” when a crash occurs, is less subject to the effects of differences in exposure.
Method: Police-reported crashes from Ontario for 2001-2005 that involved drivers aged 16-24 were used to examine the odds that these drivers had been ‘at fault’ when the crash occurred. Multiple logistic regression analysis was used to examine the association between driver license class (G1, G2 and G in Ontario), age, sex, and driver condition on whether the driver was classed as ‘driving properly’.
Results: The proportions of crashes with alcohol involvement were comparable for G1, G2 and G drivers. The results of multiple logistic regression showed very high odds ratios for adverse driver conditions, whether alcohol-related, due to fatigue, a medical condition or another cause. In addition, younger drivers and those with G1 licenses had adjusted odds ratios of approximately 1.6 of driving improperly in these crashes (P < 0.001).
Conclusions: Graduated licensing may lower overall crash rates among novice drivers; however, the crashes that do occur to these drivers remain more likely to involve younger and less experienced drivers when these drivers are found to be at fault. Improved training, enforcement or revised provisions for GLP may be required.

Mary L. Chipman and Christopher Meaney