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FARS Auxiliary Files
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The FARS Auxiliary files are datasets that are derived from the standard FARS datasets: 
1. Accident -> Acc_Aux
2. Vehicle -> Veh_Aux
3. Person -> Per_Aux
These files are joined by the standard key variables.
Please read the following document for additional details: http://www-nrd.nhtsa.dot.gov/Pubs/811364.pdf
For User Manuals, please go to: ftp://ftp.nhtsa.dot.gov/FARS/FARS-Doc/FARS_Auxiliary_Analytical_User_Manuals.zip
For SAS Format Catalog, please go to: ftp://ftp.nhtsa.dot.gov/FARS/Auxiliary_FARS_Files_Formats

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#  Release Notes  #
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04/03/2023: 
This is the first release of the 2021 FARS annual file.


04/01/2024: 
This is the first release of the 2021 FARS final file.
Refer to the "Fatality Analysis Reporting System Analytical User's Manual, 1975-2022," for guidance when using these data. https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/813556
The vPICDecode and vPICTrailerDecode files are created using NHTSA's vPIC tool and contain the vPIC decode 
results for cleanly decoded VINs. For detailed information about these files, please refer to "Product 
Information Catalog and Vehicle Listing (vPIC) Analytical User's Manual, 2022" 
https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/813547


Format files are provided as SAS Viya. For use on 32-bit or 64-bit environments, use the formats22.sas program file and compile it to create the format catalog file.