Evaluation of 2007 Montana crash data reported to the Motor Carrier Management Information System Crash File

This report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. The earlier studies showed that reporting to the MCMIS Crash File was incomplete. This report examines the factors that are associated with reporting rates for the State of Montana. MCMIS Crash File records were matched to the Montana crash file to determine the nature and extent of underreporting. It is estimated that that Montana reported 81.0 percent of reportable crash involvements in 2007. Reporting rates were found to be related to crash severity, the configuration of the vehicle, and the type of enforcement agency that covered the crash. Over 97 percent of fatal crash involvements were reported, 80.2 percent of injury/transported involvements, and 80.2 percent of towed/disabled involvements. Trucks were reported at a significantly higher rate than buses. Large trucks, especially truck tractors, were reported at a higher rate than smaller trucks. Missing data rates are low for most variables. Corresponding data elements in the MCMIS and Montana crash files were reasonably consistent, though specific problems were noted with respect to some variables. The timeliness of report was outstanding, with almost 99 percent of records submitted to the MCMIS file within 90 days of the crash.Federal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/89596/1/102788.pd

Evaluation of 2009 Oregon crash data reported to the Motor Carrier Management Information System Crash File

This report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. Earlier studies have shown that reporting to the MCMIS Crash File was generally incomplete. This report examines reporting by the State of Oregon. Because key variables used in the evaluation process are not recorded in the computerized state data files, it was not possible to calculate an overall reporting rate for Oregon. It appears that Oregon reported 28 of 30 qualifying vehicles in fatal crashes, and the 1,120 total vehicles actually reported is reasonably close to the number predicted by a model that estimates the number of vehicles reportable to the MCMIS Crash file. However, it was not possible to evaluate the extent of underreporting or overreporting. An evaluation of timeliness in reporting shows that Oregon tended to upload records to the MCMIS Crash file well after the 90-day grace period ended. Only about 5 percent of records submitted were uploaded within the grace period. Missing data rates are low for most variables, though specific problems were noted with the hazmat variables. Corresponding data elements in the MCMIS and Oregon crash files were reasonably consistent except as noted with the straight truck and truck tractor configurationsFederal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/89597/1/102789.pd

Evaluation of 2010 Delaware crash data reported to the Motor Carrier Management Information System Crash File

Special reportThis report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. The earlier studies showed that reporting to the MCMIS Crash File was incomplete. This report examines the factors that are associated with reporting rates for the State of Delaware. MCMIS Crash File records were matched to the Delaware crash file to determine the nature and extent of underreporting. Overall, it is estimated that, for 2010, 71.6% of reportable crash involvements were reported. All fatal crash involvements were correctly reported. Reporting rates were lower for less severe collisions: 66.6% of injured/transported crashes and 76.6% of towed/disabled crashes were reported. Recognition by the reporting officer that a vehicle was a CMV was important, though no single factor was identified that explained the overall reporting rate. Missing data rates are low for most variables. Corresponding data elements in the MCMIS and Delaware crash files were reasonably consistent, though specific problems were noted with respect to the MCMIS truck configuration variable. Over one-quarter of the records were inconsistent on this variable. Improvements in training to may address this issue. Only about 53 percent of records were submitted to the MCMIS file within 90 day post-crash period requirement.Federal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/90844/1/102853.pd

Evaluation of 2009 Virginia crash data reported to the Motor Carrier Management Information System Crash File

This report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. Earlier studies have shown that reporting to the MCMIS Crash File was generally incomplete. This report examines the factors that are associated with reporting rates for the State of Virginia. MCMIS Crash File records were matched to the Virginia Crash file to determine the nature and extent of underreporting. Overall, it appears that Virginia is reporting 75.2 percent of crash involvements that should be reported to the MCMIS Crash file. Because police officers are instructed to code tractors with trailers as single unit trucks with three axles, reporting rates by truck configuration were not calculated, but the reporting rate for all trucks is 76.1 percent, and the reporting rate for buses is 67.4 percent. The reporting rate for fatal crashes is 84.1 percent, 77.3 percent for injured/transported crashes, and 73.0 percent for towed/disabled crashes. The Virginia Police Crash Report form has a Commercial Motor Vehicle Section and it appears that the data recorded in this section plays a major role in determining what information gets uploaded to the MCMIS Crash file. Missing data rates are low for most variables. Corresponding data elements in the MCMIS and Virginia Crash files were reasonably consistent for several variables examined.Federal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/89600/1/102792.pd

Evaluation of 2009 New York Crash Data Reported to the Motor Carrier Management Information System Crash File

This report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. The earlier studies showed that reporting to the MCMIS Crash File was incomplete. This report examines the factors that are associated with reporting rates for the State of New York. MCMIS Crash File records were matched to the New York crash file to determine the nature and extent of underreporting. Because all levels of the MCMIS crash file reporting criteria could not be applied, the evaluation of reporting completeness was restricted to crashes that involved either a fatality or an injury transported for immediate medical attention. Of these crashes, an estimated 36.7 percent were properly reported. Reporting rates were found to be related to crash severity and the configuration of the vehicle. Over 82 percent of fatal crash involvements were reported, but only 34.6 percent of injury/transported involvements. Crashes in which a vehicle was towed due to disabling damage could not be identified in the New York crash data supplied, so reporting rates for that subset cannot be estimated. Trucks were reported at a slightly higher rate than buses. Large trucks, especially truck tractors, were reported at a higher rate than smaller trucks. Missing data rates are low for most variables. Corresponding data elements in the MCMIS and New York crash files were quite consistent, though specific problems were noted with respect to one truck configuration. The timeliness of reporting was good, with about 91 percent of records submitted to the MCMIS file within 90 days of the crash.Federal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/89602/1/102794.pd

Evaluation of 2008 Rhode Island crash data reported to the Motor Carrier Management Information System Crash File

This report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. The earlier studies showed that reporting to the MCMIS Crash File was incomplete. This report examines the factors that are associated with reporting rates for the State of Rhode Island. MCMIS Crash File records were matched to the Rhode Island crash file to determine the nature and extent of underreporting. It is estimated that that Rhode Island reported 75.0% of reportable crash involvements in 2008. The most decisive factor identified in predicting reporting was whether the Truck/Bus Crash Report Supplemental form was completed. Over 95% of reportable cases with this form completed were reported, compared with no records where the officer did not fill out the form. Missing data rates are low for most variables. Corresponding data elements in the MCMIS and Rhode Island crash files were reasonably consistent, though specific problems were noted with hazmat variables and the truck and trailer configuration.Federal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/89601/1/102793.pd

Evaluation of 2008 Alaska crash data reported to the Motor Carrier Management Information System Crash File

This report is part of a series evaluating the data reported to the Motor Carrier Management Information System (MCMIS) Crash File undertaken by the Center for National Truck and Bus Statistics at the University of Michigan Transportation Research Institute. The earlier studies showed that reporting to the MCMIS Crash File was incomplete. This report examines the factors that are associated with reporting rates for the State of Alaska. MCMIS Crash File records were matched to the Alaska crash file to determine the nature and extent of underreporting. It is estimated that Alaska reported 62.4 percent of this subset of reportable crash involvements in 2008. Reporting rates were found primarily to be related to crash severity and the configuration of the vehicle. Eighty percent of fatal crash involvements were reported, 73.9% of injured/transported, and 58.7 percent of towed/disabled involvements. Trucks were reported at about the same rate as buses as a whole, 61.4% to 66.0%. Large trucks such as tractor-semitrailers were reported at a higher rate than smaller single unit trucks. Missing data rates are low for most variables. Corresponding data elements in the MCMIS and Alaska crash files were reasonably consistent,Federal Motor Carrier Safety Administrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/89599/1/102791.pd

Trucks involved in fatal accidents factbook 2005

Special reportThis document presents aggregate statistics on trucks involved in traffic accidents in 2005. The statistics are derived from the Trucks Involved in Fatal Accidents (TIFA) file, compiled by the University of Michigan Transportation Research Institute. The TIFA database provides coverage of all medium and heavy trucks recorded in the Fatality Analysis Reporting System (FARS) file. TIFA combines vehicle, accident, and occupant records from FARS with information about the physical configuration and operating authority of the truck from the TIFA survey.Federal Motor Carrier Safety Adminstrationhttp://deepblue.lib.umich.edu/bitstream/2027.42/58054/1/48532 A48.pd

Trucks involved in fatal accidents factbook 1999

Notes: Research funds provided by the Federal Motor Carrier Safety Administration and the Affiliates Program for the Center for National Truck StatisticsFederal Motor Carrier Safety Administration, Washington, D.C.http://deepblue.lib.umich.edu/bitstream/2027.42/1364/2/48532a36.0001.001.pd

Buses involved in fatal accidents codebook 2003 (Version December 22, 2005)

Special reportThis report provides documentation for UMTRI’s file of Buses Involved in Fatal Accidents (BIFA), 2003, including distributions of the code values for each variable in the file. The 2003 BIFA file is a census of all buses involved in a fatal accident in the United States. The BIFA database provides coverage of buses recorded in the Fatality Analysis Reporting System (FARS) file. BIFA combines vehicle, accident, and occupant records from FARS with information about the physical configuration and operating authority of the bus from the BIFA survey.http://deepblue.lib.umich.edu/bitstream/2027.42/13911/2/96235A05.pd