Oklahoma reporting to the MCMIS crash file

433092360Special reportPDFResearch PaperUMTRI-2009-24DTMC75-08-H-00005Accident dataAccident severityData qualityData collectionEvaluationOklahomaUniversity of Michigan. Transportation Research InstituteBlower, DanielMatteson, AnneUnited States. Federal Motor Carrier Safety AdministrationUniversity of Michigan. Transportation Research InstituteNTL-REFERENCES AND DIRECTORIES-StatisticsNTL-SAFETY AND SECURITY-AccidentsNTL-SAFETY AND SECURITY-Highway SafetyNTL-SAFETY AND SECURITY-Human FactorsNTL-SAFETY AND SECURITY-SAFETY AND SECURITYBTS Data DirectoryThis report is part of a series evaluating the data reported to the Motor Carrier ManagementInformation System (MCMIS) Crash File undertaken by the Center for National Truck and BusStatistics at the University of Michigan Transportation Research Institute. The earlier studiesshowed that reporting to the MCMIS Crash File was incomplete. This report examines thefactors that are associated with reporting rates for the state of Oklahoma.MCMIS Crash File records were matched to the Oklahoma Crash file to determine the natureand extent of underreporting. Overall, it appears that Oklahoma is reporting 54.7 percent ofcrash involvements that should be reported to the MCMIS Crash file.Reporting rates were found to be related to crash severity, the configuration and licensing of thevehicle, and the type of enforcement agency that covered the crash. Over 74 percent of fatalcrashes were reported, but only 57.4 percent of injury/transported crashes and 52.0 percent oftow/disabled involvements. More than 72 percent of reportable involvements of tractorsemitrailerswere reported, but the reporting rate was 57.0 percent for 3-axle single-unit trucks,and 25.6 percent for 2-axle single-unit trucks. Only 13.4 percent of bus involvements werereported.Missing data rates are low for most variables. Overall, the crash report is well-designed tosupport full reporting. The information necessary to identify reportable cases is available in thecrash file, so a substantial improvement in the reporting rate can be achieved