Evaluation of New Jersey's Graduated Driver Licensing Program

Allan F. Williams Allan F. Williams LLC, Bethesda, Maryland

Neil K. Chaudhary Preusser Research Group, Inc., Trumbull, Connecticut

Brian C. Tefft AAA Foundation for Traffic Safety, Washington, DC

Julie Tison Preusser Research Group, Inc., Trumbull, Connecticut

Abstract

Objective: The objective of this study was to evaluate New Jersey's unique combination of a higher licensing age and a strong GDL system applicable to all novice drivers.

Methods: Population-based crash rates for drivers of ages potentially affected by GDL were compared, pre- and post-GDL implementation, with those of adults ages 25–59, using data on fatal crashes and on all police-reported crashes.

Results: After GDL implementation, there were statistically significant reductions in the crash rates of 17-year-olds, based on all reported crashes (16%), injury crashes (14%), and fatal crashes (25%), relative to those of drivers ages 25–59. The crash rates of 18-year-olds decreased significantly on the basis of all reported crashes (10%) and injury crashes (10%), relative to those of drivers ages 25–59. The fatal crash involvement rate of 18-year-olds decreased by 4 percent, which was not statistically significant. There was also a statistically significant reduction in fatal crashes of 16-year-old drivers; however, this is unlikely to have been attributable to GDL.

Significant reductions in nighttime crashes (of all severity levels) of drivers ages 17 and 18 were observed, as were significant yet smaller reductions in their daytime crash rates. Reductions in fatal crashes of 17- and 18-year-olds carrying more than one passenger were sizable (23 and 24%, respectively) but were not statistically significant.

Conclusions: New Jersey's licensing age of 17 eliminates most crashes at age 16. To the extent that the relative inexperience of 17-year-old drivers may negatively impact their crash rates, this effect appears to be largely blunted by New Jersey's strong GDL system. New Jersey's GDL system also reduces crashes at age 18, an age group untouched by other states' GDL systems. New Jersey's combination of licensing policies for young drivers is a model for the nation.

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ACKNOWLEDGMENT

This work was supported by the AAA Foundation for Traffic Safety.

Notes

^aIf the novice is age 21 or older, the minimum learner period is 3 instead of 6 months, and there are no passenger or hour restrictions. All other provisions apply.

^bA special learner's permit, requiring driver education, is available at age 16. An examination permit, not requiring driver education, may be obtained at age 17. Other requirements are the same except that the night restriction begins at 11 p.m. for special permit holders and at midnight for those with examination permits.

^cExemption certificates for employment or religious reasons are available.