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Event Data Recorder Use in Traffic Crash Reconstruction – Level I


This course will teach the student how to analyze any event data recorder (EDR) dat they encounter, regardless of manufacturer. The student will also learn how to analyze the EDR data which has been collected with imaging tools.

During the course, you will learn how to:

  • Analyze any set of EDR data you encounter, regardless of manufacturer
  • Determine if the event recorded is from your crash
  • Identify circumstances where EDR data is incomplete or has nothing to do with your crash
  • Understand Delta-V
  • Use EDR Delta-V along with other scene evidence to get closing speed and speed at impact
  • Use Delta V from the vehicle with the recorder to determine the Delta V of the other vehicle
  • Recognize vehicle operational conditions that would cause EDR speed data to not accurately reflect true vehicle speed
  • Determine the effect that equipment modifications have on EDR speed data
  • Use pre-crash data to identify when a vehicle lost control in order to select the peak speed before the vehicle lost control
  • Calculate the appropriate ranges for Speed at Impact for different EDR's
  • Use time-distance analysis to estimate the point of first perception
  • Utilize EDR data to gain previously unavailable insight into driver behavior and approach speed
  • Use OEM specific Excel© templates to analyze EDR data
  • Support Frye and Daubert hearings with references to copyrighted research and non-copyrighted items
  • Show analytical tools techniques for heavy truck data

Target Audience

The course enrollment is intended primarily for Virginia law enforcement personnel. On rare occasions, non-law enforcement personnel will be allowed to take the course on a case-by-case basis.

Class Dates and Locations

Event Data Recorder Use in Traffic Crash Reconstruction – Level I

  • When:
    July 26, 2021 - July 30, 2021
    >8:00 a.m. – 5:00 p.m.
  • Where:
    • Rappahannock Regional Criminal Justice Academy
    • 3630 Lee Hill Drive
    • Fredericksburg, VA 22408


At a minimum, you must have completed IPTM's Advanced Traffic Crash Investigation course or its equivalent and have an understanding of traditional scene evidence traffic crash reconstruction such as slide to stop formulas, momentum analysis, and critical speed yaw analysis. Recommended to have completed CDR Technician I & II course or equivalent.


Tuition for the course is FREE for Virginia law enforcement; however, travel/lodging/per diem/other expenses is not covered. Registration is limited to 25.

To register, email and provide the following information.

  • Agency name
  • Information pertaining to the person applying to attend the class
    • Name and rank/title
    • Phone number and email address
    • Completion date of the IPTM's Advanced Traffic Crash Investigation course or its equivalent
    • Completion date of CDR Technician I & II course or equivalent

Materials Needed

  • Laptop with MS Excel
  • Calculator with cosine, tangent and square root functions