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There are two versions of SafetyHAT available for download. The Microsoft Access Template Version is intended for individuals who plan on regularly using SafetyHAT and have Microsoft Access 2010 or later. The Microsoft Access Runtime Version is an evaluation version intended for users without Microsoft Access 2010 or later.

  • MS Access Template Version (10MB): This version provides a reusable SafetyHAT template for Microsoft Access 2010 or later.  You will be able to evaluate multiple systems using STPA by creating new instances of SafetyHAT directly from MS Access. This version allows the user to view or edit the underlying data tables, or database structure.

    Download the SafetyHAT Template Version (
    MD5 Checksum: 4a74bfda68a16ec5a0148e0794b98b13
  • MS Access Runtime Version (200MB): This is a single-use version of SafetyHAT intended for users without Microsoft Access 2010 or later. It uses MS Access 2010 Runtime to run SafetyHAT. This version of SafetyHAT allows the user to evaluate the software capability and complete an entire analysis for a single system. This version also does not allow the user to view or edit the underlying data tables, or database structure.

    Download the SafetyHAT Runtime Version (
    MD5 Checksum: 662bc6f2a16179e1457a74cb5ba45d80

If you use SafetyHAT in your work, we ask that you please cite the software. An example citation:

“Volpe, The National Transportation Systems Center.  2014.  Transportation Systems Safety Hazard Analysis Tool (SafetyHAT).  Cambridge, MA.”

How to Use MD5 Checksum to Validate the Integrity of a Downloaded File

Whenever you download files from the internet, it is important to verify that the file you are downloading IS in fact the file that you wanted to download – that is, nobody has modified it in any way.

You can do this by calculating the MD5 checksum of the file that you downloaded and comparing it to the one we’ve provided below the download link. There are many tools and resources available online to assist you with doing this. We used the File Checksum Integrity Verifier (FCIV) utility from Microsoft. 

You can download FCIV for free here.

If the checksum values do not match, someone may have modified the contents of the file – if this is the case, do not run the application and report the problem to so that we can investigate.

Limitation of Liabilities:

In no event shall the US Dept. of Transportation be liable to you or any party related to you for any indirect, incidental, consequential, special, exemplary, or punitive damages or lost profits, even if the US Dept. of Transportation has been advised of the possibility of such damages. In any event, the US Dept. of Transportation’s total aggregate liability to you for all damages of every kind and type (regardless of whether based in contract or tort) shall not exceed the purchase price of the product.

Disclaimer of Warranties:

The US Dept. of Transportation disclaims to the fullest extent authorized by law any and all other warranties, whether express or implied, including, without limitation, any implied warranties of title, non-infringement, integration, merchantability or fitness for a particular purpose. Without limitation of the foregoing, the US Dept. of Transportation expressly does not warrant that:

(a) the software will meet your requirements or expectations;

(b) the software or the software content will be free of bugs, errors, viruses or other defects;

(c) any results, output, or data provided through or generated by the software will be accurate, up-to-date, complete or reliable;

(d) the software will be compatible with third party software;

(e) any errors in the software will be corrected.


(a) Compliance with Law. The Licensee assumes all responsibility for selecting the software and for the results obtained from the use of the software. The Licensee shall bear the entire risk as to the quality and the performance of the software.