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United States Department of Transportation United States Department of Transportation

The Large Truck Crash Causation Study Report to Congress

The Motor Carrier Safety Improvement Act of 1999 (MCSIA), P.L. 106-159, mandated a study to determine the causes of, and contributing factors to, crashes involving commercial motor vehicles.  MCSIA also directed the Secretary to transmit to Congress the results of the study.  The U.S. Department of Transportation’s Federal Motor Carrier Safety Administration and National Highway Traffic Safety Administration conducted a multiyear, nationwide study of factors that contribute to truck crashes.  The Large Truck Crash Causation Study (LTCCS) identifies areas that need to be addressed by effective crash countermeasures.

A nationally representative sample of large truck fatal and injury crashes was investigated during 2001 to 2003 at 24 sites in 17 States.  Each crash involved at least one large truck and resulted in at least one fatality or injury.  Data were collected on up to 1,000 elements in each crash.  The total sample involved 967 crashes, which included 1,127 large trucks, 959 non-truck motor vehicles, 251 fatalities, and 1,408 injuries.

DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact julie.bergling@dot.gov.
Last updated: Thursday, April 23, 2020