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The Iowa graduated driver licensing program: effectiveness in reducing crashes of teenage drivers.

Authors
Neyens-DM; Donmez-B; Boyle-LN
Source
J Saf Res 2008 Sep; 39(4):383-390
NIOSHTIC No.
20040662
Abstract
PROBLEM: Graduated Driver Licensing (GDL) programs vary in the United States in terms of implementation and restrictions. The State of Iowa's GDL program is assessed for its effectiveness in reducing crashes among teenage drivers. METHOD: Time series analysis was used to evaluate police documented crashes involving 16-, 17-, and 18-year-old drivers over a 10 year period, with an intervention identified at the point of GDL implementation. RESULTS: After controlling for seasonal trends and auto-correlative effects, a significant reduction in the crash rate of and 16- and 17-year-old drivers was observed due to the GDL implementation. However, there were no significant reductions in crash rates for 18-year-old drivers. DISCUSSION: The analyses suggest that the Iowa GDL program is effective in reducing the crash rates of 16- and 17-year-old drivers but the effects do not sustain for 18-year-old drivers. IMPACT ON INDUSTRY: The results suggest that the program appears to be working, however further analysis is needed to determine what factors are preventing lasting effects for these teenage drivers.
Keywords
Age-groups; Humans; Adolescents; Accidents; Accident-rates; Behavior; Models; Statistical-analysis; Automotive-industry; Drivers; Motion-studies; Risk-factors; Author Keywords: Teenagers; intervention analysis; young drivers; crash rates; ARIMA model; time-series analysis
Contact
Linda Ng Boyle, 3131 Seamans Center, Iowa City, IA, 52242
CODEN
JSFRAV
Publication Date
20080901
Document Type
Journal Article
Email Address
lnboyle@engineering.uiowa.edu
Funding Type
Grant
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008491
Issue of Publication
4
ISSN
0022-4375
Source Name
Journal of Safety Research
State
IA
Performing Organization
University of Iowa
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