U. S. Department of TransportationNational Highway Traffic Safety AdministrationNational Center for Statistics and AnalysisWashington, D.C. 20590FARS Analytic Reference Guide Table of Contents 1Table of Contents2010 FARSNASS GES Standardization......................................................................... 2New in 2010 FARS ......................................................................................................... 4Variables with Changes in Definitions and Attributes........................................... 5New SAS Tables in 2010................................................................................... 32Summary of the SAS Naming Changes in 2010 ................................................ 38Trafficway Descriptor Data Elements 2010........................................................ 39Preface ......................................................................................................................... 41FARS Operations.......................................................................................................... 42FARS Instructions......................................................................................................... 43FARS SAS Data Sets.................................................................................................... 44FARS Variable List........................................................................................................ 46Variable Definitions and Codes ..................................................................................... 55The ACCIDENT Data Set .................................................................................. 60The VEHICLE Data Set ................................................................................... 110The PERSON Data Set ................................................................................... 247The CEVENT Data Set.................................................................................... 295The VEVENT Data Set .................................................................................... 302The VSOE Data Set ........................................................................................ 309The FACTOR Data Set.................................................................................... 313The VIOLATN Data Set ................................................................................... 315The VISION Data Set ...................................................................................... 319The MANEUVER Data Set .............................................................................. 321The DISTRACT Data Set................................................................................. 323The DRIMPAIR Data Set................................................................................. 325The NMIMPAIR Data Set................................................................................. 327The NMCRASH Data Set ................................................................................ 329The NMPRIOR Data Set ................................................................................. 331The SAFETYEQ Data Set ............................................................................... 333The PARKWORK Data Set.............................................................................. 335Appendices................................................................................................................. 419Appendix A: Vehicle MakeModel Designation ........................................... 420Appendix B: V23 Accident Type Diagram................................................... 526Appendix C: Additional Variable Information .............................................. 527Appendix D: FARS Variables by SAS Table and Year ............................... 559Appendix E: Pedestrian and Bicyclist Data Availability Change.................. 579FARS Analytic Reference Guide 2010 FARSNASS GES StandardizationFARS Analytic Reference Guide 2010 FARSNASS GES Standardization 22010 FARSNASS GES StandardizationThe purpose of this document is to inform users of NHTSA’s Fatality Analysis Reporting System(FARS) and National Automotive Sampling System General Estimates System (NASS GES)data about some of the more significant changes to the 2010 data as a result of thestandardization of the data elements between the two systems. In addition to the changesoutlined below, a listing of all specific data element changes can be found in the following table:Variables with Changes in Definitions and AttributesThe FARSNASS GES Standardization began in 2006, with the second phase beingimplemented in the 2010 data collection year. The definition and element attribute changesintroduced in 2010 are the most substantive and most numerous changes in one year in thereconciliation of the FARS and NASS GES data systems. In the 2011 data collection year – thethird and final planned phase of the FARSNASS GES Standardization – nearly all remainingdata element attribute and file structure differences will be addressed. As a single, unified dataentry system, FARSNASS GES will be compatible with the Model Minimum Uniform CrashCriteria (MMUCC), the guideline used by nearly all States to develop and revise their crashforms and databases. Once complete, the FARSNASS GES Standardization will simplify crashdata coding and analysis as well as reduce costs and errors.Probably the most notable changes were the introduction of precrash information in FARS(already collected in NASS GES) and a change to case structure or how the groups of relateddata elements are organized. For example, in 2009 a FARS case consisted of Crash, Vehicle,Driver and Person coding forms. In 2010, the Person level form was split into Motor VehicleOccupant and NonMotor Vehicle Occupant forms, and the Precrash form was added (new toFARS, though not to NASS GES).These structure changes also include changes to how the data are now stored and madeavailable. For example, for FARS, there are now 16 data tables rather than 4. This results fromthe changes in the number of coding forms and from changes in specific data elements.Several data elements that used to allow only a specified number of responses now have a“selectallthatapply” format. There is a separate data table for each of these data elements.At the Crash level, a Crash Events Table was added to FARS (and modified in NASS GES). InNASS GES, NonHarmful Events were added to the Crash Events Table.The precrash information represents not only a new coding form, but more importantly, largely anew concept for FARS, attempting to collect data about the conditions, events and driveractions that preceded and may have contributed to the crash. Precrash data is intended toimprove crash avoidance research and has been included in NASS GES since 1992.The new FARS Precrash form information consists of 23 data elements, 9 of which werepreviously coded at the Crash level, 3 each at the Vehicle and Driver levels, and 8 newelements. Nine trafficway descriptor data elements were moved from the crash level to the newprecrash level. These elements provide details about the characteristics of the trafficwayselected for each vehicle.FARS Analytic Reference Guide 2010 FARSNASS GES StandardizationFARS Analytic Reference Guide 2010 FARSNASS GES Standardization
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