Design of the In-Vehicle Driving Behavior and Crash Risk Study (2011) / Chapter Skim
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From page 7... ...
2007) , as well as expertise from researchers in the transportation safety field, 392 research questions were identified for consideration in the NDS design.
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For instance, a researcher may be interested in looking at a speeding-related countermeasure to evaluate whether it may have been possible to prevent any speeding-related crash events observed. The research questions were grouped by the SHRP 2 Safety Project S02 contractor into the following high-level categories: • How does driver distraction influence crash likelihood?
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Passenger cars and light trucks will be the focus of this study because these types of vehicles accounted for almost 95% of all vehicles on the road in 2007, as reported by Ward's Automotive Group (2010) , and 94% of all motor vehicle crashes, as reported by the National Highway Traffic Safety Administration (2007)
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10Gender and Primary Age Range Age Range Description One Year Two Years DAS Units Participants Data-Years M 16–17 Minor teen 72 28 100 172 200 M 18–20 Adult teen 72 28 100 172 200 M 21–25 Young adult 72 28 100 172 200 M 26–35 Adult 72 28 100 172 200 M 36–50 Middle adult 72 28 100 172 200 M 51–65 Mature adult 72 28 100 172 200 M 66–75 Younger older driver 72 28 100 172 200 M 76+ Older older driver 72 28 100 172 200 F 16–17 Minor teen 72 28 100 172 200 F 18–20 Adult teen 72 28 100 172 200 F 21–25 Young adult 72 28 100 172 200 F 26–35 Adult 72 28 100 172 200 F 36–50 Middle adult 72 28 100 172 200 F 51–65 Mature adult 72 28 100 172 200 F 66–75 Younger older driver 72 28 100 172 200 F 76+ Older older driver 72 28 100 172 200 Any Advanced vehicle technology 0 350 350 350 700 Total 1,152 798 1,950 3,102 3,900 Table 2.1. Sample Design (with Target Cell Values)
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From page 11... ...
11Figure 2.1. Sites for SHRP 2 Naturalistic Driving Study, indicating the number of DAS units managed per year at each site.• Erie County, N.Y.: Calspan–University of Buffalo Research Center (CUBRC)
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From page 12... ...
to target the harder-to-fill cells in the experimental design. For consistency, the call center will also field incoming inquiries generated by the traditional recruiting ads.
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