Design of the In-Vehicle Driving Behavior and Crash Risk Study (2011) / Chapter Skim
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Pages 13-20
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From page 13... ...
All of their concerns were addressed in some fashion, and all members of the panel ultimately indicated their approval of the plan that is presented herein. On the basis of the exercise described, an approach was defined wherein each participant will be assessed on several dimensions thought to be relevant to driving and potentially predictive of some portion of driving behaviors, problems, or crash-related events (e.g., crashes and near crashes)
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From page 14... ...
14systematic approach was undertaken to identify the most relevant dimensions and essential criteria in the development of the resulting driver assessment testing plan. The sleep questionnaire was constructed in close coordination with the Harvard Medical School Division of Sleep Medicine.
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From page 15... ...
Driving Knowledge/History Assessments Custom questionnaire based on several state licensing practice tests Custom questionnaireData Acquisition System Variables The DAS comprises three primary units: the head unit, the main unit, and the front radar assembly as illustrated in Figure 3.2. Cabling will provide hard-wired connections between the head unit and main unit as well as a power source.
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From page 16... ...
Furthermore, for those researchers interested in traffic signal state detection, the color camera will provide the ability to conduct such research through a post hoc machine application or manual data analysis. Additionally, the alcohol sen-sor, incident button, illuminance sensor, inertial acceleration, and gyroscopic sensors will be incorporated into the head unit assembly.
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From page 17... ...
Use of Bluetooth for this purpose alleviates the need of running cables through the vehicle's firewall to the main unit, thereby decreasing risk to the participant and saving valuable installation time and real costs associated with permanently altering a participant's vehicle. This is important because each S07 site must maintain an installation throughput rate of two vehicles per bay per day (i.e., where the largest sites have three installation bays and the smallest have a single installation bay)
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From page 18... ...
18Location Sensor Data to Be Collected Head unit Main unit Main unit Head unit Radar unit Main unit Head unit Head unit Head unit Head unit Main unit Table 3.8. Data Acquisition System Variables Multiple cameras/video Accelerometer data Rate sensors GPS Forward radar Cell phone module Illuminance sensor Passive alcohol sensor Incident push button Audio Turn signals (from vehicle network data or directly from the signals themselves)
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From page 19... ...
Crash investigations will only be carried out for crashes that meet certain criteria of interest. Such criteria mayBased on the 100-Car Study, Modified Based on Crash Rates Crash/Incident Severity 100-Car Study by Fatality Rate from GESa and NHTSb Police reported 624 363 230 Nonreported, reportable 975 566 360 Nonpolice reported: low-g contact or tire strike 1,599 929 590 Total crashes 3,198 1,859 1,180 Near crashes 29,679 17,247 10,952 a General Estimates System.
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From page 20... ...
. Considering data privacy and IRB issues, the only people to be interviewed in all crash investigations will be the consented drivers (and possibly other consented passengers)
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