The National Automotive Sampling System (NASS) Crashworthiness Data System (CDS) is a nationwide crash data collection program sponsored by the U.S. Department of Transportation. It is operated by the National Center for Statistics and Analysis (NCSA) of the National Highway Traffic Safety Administration (NHTSA). NASS began data collection in 1979.

The National Highway Traffic Safety Administration (NHTSA) followed a reasonable process for redesigning the National Automotive Sampling System Crashworthiness Data System (NASS-CDS), which is a nationally representative sample of police-reported motor-vehicle traffic crashes. The Office of Management and Budget (OMB) has standards and guidelines that specify the professional principles and practices that agencies should follow and the level of quality and effort expected when redesigning an existing survey, such as NASS-CDS. This book assesses the process NHTSA used to redesign NASS-CDS; and the potential for this redesign to improve the NASS-CDS sample.