Evaluation of the locations of Kentucky's traffic crash data.

PDFTech ReportKTC-10-16/KSP3-10-1FTraffic accidentsData analysisEvaluationGlobal Positioning SystemGeographic information systemsAccuracyAccident locationsKentuckyUniversity of Kentucky Transportation CenterGreen, Eric R.Agent, Kenneth R.University of Kentucky Transportation CenterKentucky. Transportation CabinetUS Transportation CollectionAn evaluation of a random sample of crashes from 2009 was performed to assess the current accuracy of the crash data's location information.The location of the crash was compared to the presumed location using several report data elements such as nearest city, street address, roadway descriptions and the crash narrative. A second evaluation was performed on crash data since the Maplt system was introduced (in late 2007) through 2009. This analysis calculated the distance between the locations plotted by CRMP and by the GPS data and summarized the data by several factors.The evaluation of the random sample of crash data revealed that the location information is accurate in a substantially higher number of records compared to the sutdy five years ago (92 percent accuracy compared to about 50 percent). Furthermore, the evaluation of 2007 through 2009 crash data yielded results that aided in making recommendations that will address the most egregious and frequent errors related to location data