National Association of Professional Accident Reconstruction Specialists

Members get access to the Reference Library of technical papers and crash related reference materials, and a NAPARS exclusive: all back-issues of Accident Reconstruction Journal and Accident Investigation Quarterly, and more! Click Join for more details!   


 Accident Reconstruction Journal update, 01 June 2024: Issue 34(3), #201 is out.

 NAPARS News update, 10 June 2024: The second newsletter this year is out, and in the Ref.Lib.

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Upcoming events

    • 19 Jul 2024
    • 12:00 - 14:00
    • Worldwide via Zoom
    • 1439
    Counterfeit Airbags!  2 hours with Thomas Nichols
    DATE: Friday, 19 July 2024
    TIME: 12 noon - 2 pm EDT (GMT-4)
    COST: Free for NAPARS members;  $5 for non-members
    ACTAR: This event has been approved by ACTAR for 2 CEUs. Accredited attendees should be prepared to sign in with i-attend during the

    All attendees will be able to request an attendance certificate during the show.


    We will have Thomas Nichols from GM in to discuss the problem with counterfeit airbags. The agenda includes:

         1) Known Cases
         2) Composition and Performance of Genuine OEM Airbags
         3) Lab analysis of Counterfeit airbags and their deployment
         4) How to identify counterfeit airbags
         5) Resources & Support

    When Thomas is finished, Wade Bartlett will fill the remaining time with a discussion of how the system decides whether or not to fire an airbag:

    -It is a Predictive system - attempting to determine what's about to happen in the next 150ms based on the early part of the event

    -Acceleration Rate of Change is called JERK

    -Seatbelt status is (probably) taken into account

    -The idea that "bags deploy at some speed change" is WRONG...but here's why it got talked about that way.

    • 23 Sep 2024
    • 08:00
    • 26 Sep 2024
    • 17:00
    • Savannah GA
    • 0
    Join waitlist

    We are pleased to announce final training of 2024 hosted by NAPARS:

    Heavy Vehicle Event Data Recorder (HVEDR) Use in Traffic Crash Investigation Analyst Training, by Forensic Training Group (

    This four-day training offers further training into the history, development, and function of heavy vehicle digital forensics. The investigator’s expanded interpretation skills will assist in the completion of a situation-based crash reconstruction.  Topics include:  

    • Best practices used to access and document HVEDR data,
    • HVEDR Data Available on Heavy Trucks,
    • Use of OEM software/adapters,
    • Use of the Synercon Forensic Link Adapter and TruckCRYPT software,
    • Validation Testing  
    • Case Analysis
    • Outside testing on Tuesday or Wednesday, half day, be prepared for dirty work!

    Eligible for ACTAR credits

    Location: Training facility for Savannah Police Department, 3401 Edwin Street, Savannah GA

    September 23-26 ( Monday thru Thursday), 8-5 every day.

    Cost: $500 for NAPARS members, $750 non-members

    Attendees will be on their own for lunch.

    • 22 Apr 2025
    • 24 Apr 2025
    • Newport Beach, CA
    NAPARS and CA²RS are teaming up to host the

    2025 Symposium on EDR Research and Testing

    We'll be at the Hyatt Regency in Newport Beach, CA

    Mark your calendar.

    More details on speakers as they come available.

    We'll open up registration in a few months.

    • 22 Oct 2025
    • 24 Oct 2025
    • Lake George, NY

    The New York State Traffic Accident Reconstruction Specialists will be hosting the 2025 Joint Conference in the Lake George NY area.

    Venue: Fort William Henry Resort

NAPARS membership includes a complimentary subscription to the digital edition of the Accident Reconstruction Journal, which comes out 6 times each year. ARJ provides timely, reliable, and fresh research, thought-provoking reconstruction related studies and meaningful crash test data from multiple sources.
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