Critical Reasons for Crashes Investigated in the National Motor Vehicle Crash Causation Survey

Databases such as the National Automotive Sampling System (NASS) Crashworthiness Data System (CDS) do not provide information on pre-crash scenarios and the reasons underlying the critical pre-crash events. In 2005, the National Highway Traffic Safety Administration (NHTSA) was authorized under Section 2003(c) of the Safe, Accountable, Flexible, Efficient, Transportation Equity Act: A Legacy for Users (SAFETEA-LU) to conduct a national survey to collect on-scene data pertaining to events and associated factors that possibly contributed to crash occurrence. NHTSA’s National Center for Statistics and Analysis (NCSA) conducted the NMVCCS from July 3, 2005, to December 31, 2007. Crashes were investigated at the crash scene to collect driver, vehicle, and environment-related information pertaining to crash occurrence, with a focus on driver’s role. The targeted information was captured mainly through four data elements: (i) movement prior to critical pre-crash event (i.e., the movement of the vehicle immediately before the occurrence of the critical event); (ii) critical pre-crash event (i.e., the circumstance that led to vehicle’s first impact); (iii) critical reason for the critical pre-crash event (i.e., the immediate reason for the critical event, which is often the last failure in the causal chain of events leading up to the crash); and (iv) the crash associated factors (i.e., the factors that are likely to add to the probability of crash occurrence). This was done with reference to the crash envelope that comprises of a sequence of events, referring to the above data elements, which eventually led to the crash. Refer to the section Scope and Limitations of NMVCCS data. This Crash•Stats presents some statistics related to one of the above-mentioned four data elements, namely “critical reason for the critical pre-crash event.”


  • English

Media Info

  • Media Type: Web
  • Edition: Brief Statistical Summary
  • Features: Tables;
  • Pagination: 3p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01666583
  • Record Type: Publication
  • Report/Paper Numbers: DOT HS 812 506
  • Created Date: Apr 23 2018 4:44PM