Large-Truck Crash Causation Study: An Initial Overview

United States Federal Motor Carrier Safety Administration;National Highway Traffic Safety Administration2006PDFTech ReportStarnes, MarcUnited States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and AnalysisUnited States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and AnalysisUnited StatesCrash causesTrucking safetyMotor carriersTrucksTruck crashesCrash dataHazardous materialsData analysisStatistical analysisCrash risk forecastingCrash typesEnvironmentLTCCSCritical eventCritical reasonDOT HS 810 646NPO-121The Large-Truck Crash Causation Study (LTCCS) is a data collection project conducted by the National Highway Traffic Safety Administration (NHTSA) and the Federal Motor Carrier Safety Administration (FMCSA) of the United States Department of Transportation (USDOT). NHTSA\u2019s National Center for Statistics and Analysis (NCSA) worked together with FMCSA to develop the LTCCS, which was conducted within the National Automotive Sampling System (NASS) that NCSA operates. The tables in this report were created through the use of the data collected in the LTCCS. While the LTCCS collected data on approximately 1,000 variables, the tables presented in this report comprise only a sample of these variables. The complete LTCCS variable database can be used jointly to examine a large number of issues surrounding large-truck crashes. One section in the report focuses on \u201ccrash-level\u201d variables, which provide counts of crashes that occurred under certain characteristics (i.e., crash counts stratified according to how many vehicles were in the crash). The next section includes tables that are presented at the \u201cvehicle level.\u201d These tables thus provide counts of the number of vehicles involved in certain types of crashes (i.e., vehicle counts that have been stratified by the injury severity of the person most severely injured in each vehicle). The tables in the following section are presented at the \u201cdriver level.\u201d These tables display counts of drivers that were involved in certain crash scenarios (i.e., the number of drivers involved in the crashes, stratified by the age of the driver). The appendix includes tables and computer programs for calculating standard errors and confidence intervals using LTCCS data.128