General Estimates System
The General Estimates System (GES) is a nationally representative sample of police-reported motor vehicle crashes of all types from minor to fatal. The system's purpose is to identify traffic safety problem areas, and to provide a basis for regulatory and consumer initiatives, and cost benefit analyses of traffic safety initiatives. Although various sources suggest that about half of motor vehicle crashes are not reported to the police, the majority of the unreported crashes involve only minor property damage and no significant personal injury. By restricting attention to police-reported crashes, the GES concentrates on those crashes of greatest concern to the highway safety community and the general public.
http://ntl.bts.gov/lib/19000/19000/19096/PB2002104492.pdf. Accessed August 16, 2010.
National Automotive Sampling System (NASS) General Estimates System (GES) Analytical User's Manual 1988-99. Washington, DC: U.S. Department of Transportation; National highway Traffic Safety Administration; National Center for Statistics and Analysis, Dec. 2000.