Development of a Speeding-Related Crash Typology: [Summary Report]
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2010-01-01
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TRIS Online Accession Number:01158468
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Abstract:Speeding, the driver behavior of exceeding the posted speed limit or driving too fast for conditions, has consistently been shown to be a contributing factor to a signifcant percentage of fatal and nonfatal crashes. Between 1990 and 2006, the frequency of speeding-related (SR) fatal crashes ranged from 11,000 to 13,000 each year, and the percentage of SR total fatal crashes ranged between 30 and 33 percent according to data observed in the Fatal Analysis Reporting System (FARS).(1) Thus, speeding is a significant safety issue warranting attention based on its size and impact on society. While the United States has seen progress in Tech Report major safety issues such as occupant restraint use and driving under the influence of alcohol, little if any progress has been made with speeding. In response to this issue, the United States Department of Transportation has instituted the Speed Management Strategic Initiative, seeking more effective ways to manage the crash-related effects of speeding.(2) In support of this initiative, this study examined recent crash data through the development of an SR crash typology. Such a typology can help define the crash, vehicle, and driver characteristics that seem to result in a higher probability of SR crashes. Thus, the goal of this study was to determine the “what,” “where,” “when,” and “who” descriptors of SR crashes in order to provide guidance to the future development of new treatments and to better target new and existing treatments to subgroups of drivers and types of roadways (e.g., two-lane rural) or roadway locations (e.g., unsignalized intersections).
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