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

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.

Pieces of Iowa’s Past, March 9, 2012

Pieces of Iowa’s Past, published by the Iowa State Capitol Tour Guides weekly during the legislative session, features historical facts about Iowa, the Capitol, and the early workings of state government. All historical publications are reproduced here with the actual spelling, punctuation, and grammar retained. March 7, 2012 THIS WEEK: Orgin of the Historical Department of Iowa BACKGROUND: Charles Aldrich Charles Aldrich served as Iowa Chief Clerk of the House of Representatives for the eighth (1860) and ninth (1862) general assemblies. He volunteered for the Union Army in 1862 and served with the Thirty-second Iowa Infantry for 18 months. Aldrich came to Webster City, Iowa, in 1857. He started the Hamilton Freeman newspaper. He was also involved in the publishing and editing of the Dubuque Times and Marshall County Times. In 1882, at age 53, he represented Hamilton County in the House of Representatives during the 19th General Assembly. He was appointed as the Curator of the State Historical Department at its creation in 1890.