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J Safety Res. 2004;35(3):337-44.

Michigan's graduated driver licensing program: evaluation of the first four years.

Author information

1
University of Michigan Transportation Research Institute, 2901 Baxter Road, Ann Arbor, MI 48109-2150, USA. jshope@umich.edu

Abstract

INTRODUCTION:

To evaluate the four-year outcome of Michigan's graduated driver licensing (GDL) program, motor-vehicle crash data for 16-year-old drivers in 1996 (pre-GDL), and 1998-2001 (post-GDL) were analyzed.

METHOD:

Relative risks and 95% confidence intervals for several crash types were computed, and pre-post-GDL population-based crash rates were compared. Reductions in crash risks among 16-year-olds previously found in 1998 and 1999 were generally maintained in 2000 and 2001.

RESULTS:

Reductions in crash risk among 16-year-olds from 1996 to 2001 were 29% for all, 44% for fatal, 38% each for nonfatal-injury and fatal-plus-nonfatal-injury, 32% for day, 31% for evening, 59% for night, 32% for single-vehicle, and 28% for multi-vehicle crashes. Even after adjusting for more general population-wide changes among drivers 25 years and older that might have contributed to changes in 16-year-old crash risk, reductions remained impressive (19% for all crashes in 2001).

IMPACT ON INDUSTRY:

As one approach to reducing teenage motor-vehicle morbidity and mortality, GDL remains promising.

PMID:
15288567
DOI:
10.1016/j.jsr.2004.04.001
[Indexed for MEDLINE]

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