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   Ana Maria Eigen
      Ana Maria Eigen
      
                    
            Research Highway Safety Specialist
      
                    
            Office of Safety and Operations Research and Development
      
                    
            Turner-Fairbank Highway Research Center6300 Georgetown PikeMcLean, VA 22101United States
      
          
    **Email:**ana.eigen@dot.gov**Phone:** (202) 493-3168
    If you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay services.
                
                Guidebooks
    

    
    
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Detailed guidebooks for each HSIS State are available to HSIS users. The purpose of the guidebooks is to provide sufficient information for both the analyst and the programmer to effectively use the system. The guidebooks document data quality issues uncovered through annual quality control checks or reported by system users.

The guidebook for each State contains a basic description of the State data system, an alphabetized listing (by file type) of all available variables, detailed definitions of each category present within each variable, and notes on the quality of the variable. The guidebooks are updated on a two-three year cycle or as significant changes occur. (Note that in the past, HSIS also published a “Volume II” containing single-variable tabulations for a large number of "key" variables within each of the files across five years. Based on a user survey, Volume II is no longer published. However, for users needing information on sample sizes across years, custom-designed tables will be prepared by HSIS staff on request.)

HSIS Guidebook for California State Data Files PDF (752 KB)
March 2023

HSIS Guidebook for Charlotte, NC Data Files PDF (615 KB)
March 2023

HSIS Guidebook for Illinois State Data Files PDF (225 KB)
March 2023

HSIS Guidebook for Maine State Data Files PDF (1 MB)
March 2023

HSIS Guidebook for Minnesota State Data FilesPDF (1.3 MB)
March 2023

HSIS Guidebook for North Carolina State Data Files PDF (2,266 KB)
March 2023

HSIS Guidebook for Ohio State Data Files PDF (1.25 MB)
March 2023

HSIS Guidebook for Washington State Data Files PDF version (1.25 MB)
March 2023
              
      
    
          Last updated: Wednesday, August 30, 2023 U.S. DEPARTMENT OF TRANSPORTATION

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