United States Department of Transportation
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Motorcycle Crash Causation Study: Volume 2—Coding Manual
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2019-02-01
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[PDF-5.08 MB]
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Abstract:Cooperative Agreement No. DTFH61-06-H-00034 aimed to use the results of the National Highway Traffic Safety Administration-sponsored Motorcycle Crash Causation Study. The original agreement was to conduct a large-scale study and collect data on 280 motorcycle crashes and 560 control (comparison) cases and make that data available to researchers; however, the agreement was modified in July 2014 to increase the study to 350 crashes and 700 control cases.
The study gathered data on motorcycle crashes by intensive post-crash investigations, control motorcycle observations, and interviews conducted in Orange County, CA. The study developed a dataset that researchers can access and use to investigate additional research questions. The database provides data from 351 injury crashes and 702 paired control observations. Of the crashes observed, 82 were single-vehicle crashes, and 269 were multiple-vehicle crashes involving a total of 294 other in-transit vehicles and 11 parked vehicles. Forty crashes resulted in fatalities with 22 single-vehicle-crash fatalities and 18 multiple-vehicle-crash fatalities observed.
This volume provides the coding manual and data-collection forms used in the study. The coding manual defines and clarifies the meaning of the codes used to record the responses to the questions on the data forms.
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