Crash Data Validation: An Iowa Case Study, February, 2007

(2007) Crash Data Validation: An Iowa Case Study, February, 2007. Iowa State University


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With the quickening pace of crash reporting, the statistical editing of data on a weekly basis, and the ability to provide working databases to users at CTRE/Iowa Traffic Safety Data Service, the University of Iowa, and the Iowa DOT, databases that would be considered incomplete by past standards of static data files are in “public use” even as the dynamic nature of the central DOT database allows changes to be made to both the aggregate of data and to the individual crashes already reported. Moreover, “definitive” analyses of serious crashes will, by their nature, lag seriously behind the preliminary data files. Even after these analyses, the dynamic nature of the mainframe data file means that crash numbers can continue to change long after the incident year. The Iowa DOT, its Office of Driver Services (the “data owner”), and institutional data users/distributors must establish data use, distribution, and labeling protocols to deal with the new, dynamic nature of data. In order to set these protocols, data must be collected concerning the magnitude of difference between database records and crash narratives and diagrams. This study determines the difference between database records and crash narratives for the Iowa Department of Transportation’s Office of Traffic and Safety crash database and the impacts of this difference.

Item Type: Departmental Report
Keywords: crash data analysis, crash records, database validation, DOT crash database
Subjects: Transportation > Research
Transportation > Traffic safety > Accident report forms
Transportation > Traffic safety
Transportation > Motor vehicles
ID Code: 5420
Deposited By: Margaret Barr
Deposited On: 02 Oct 2007
Last Modified: 02 Oct 2007