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B - NTSB SAE EDR Symposium 2003

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Dr. McElroy's slide presentation at the 2003 NTSB SAE EDR Symposium

Published in: Automotive, Technology, Business
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B - NTSB SAE EDR Symposium 2003

  1. 1. EDR User Perspectives on Parameters & Data Accessibility: Independent Investigator/Consultant Accident Reconstruction Robert C. McElroy, Ph.D. Forensic Accident Investigations, Inc. www.ForensicAccident.Com SAE
  2. 2. Accident Reconstruction <ul><li>Traffic Traffic Accident Reconstruction is the effort to determine, from whatever information is available, how the accident occurred. </li></ul><ul><li>Reconstruction is not determining why an accident happened. </li></ul>
  3. 3. Examples “ Ouch” Impact Example #1: out & down Example #2: impact & final rest Final Rest Crash analysis can be simple or complex, with or without EDR. out D o w n
  4. 6. Accident Reconstruction <ul><li>Traffic Traffic Accident Reconstruction is the effort to determine, from whatever information is available, how the accident occurred. </li></ul><ul><li>Reconstruction is not determining why an accident happened. </li></ul>
  5. 7. EDR User Perspective Issues <ul><li>Data ownership </li></ul><ul><li>Vehicles with downloadable data </li></ul><ul><li>Data retrieval </li></ul><ul><li>Data interpretation </li></ul><ul><li>Correlation of data sources </li></ul><ul><li>Report findings </li></ul><ul><li>Frye hearings </li></ul>
  6. 8. Data Ownership ( simplified ) <ul><li>Owner / Driver of the vehicle owns the data </li></ul><ul><li>Insurance company rights to the data </li></ul><ul><li>Manufacturer proprietary data </li></ul>
  7. 9. Does Vehicle Have Data ? <ul><li>Age / Model </li></ul><ul><li>Manufacturer </li></ul><ul><li>Type of impact </li></ul>
  8. 10. <ul><li>Direct connection to EDR </li></ul><ul><li>OBD connector under the dash </li></ul>Data Retrieval
  9. 11. Data Interpretation <ul><li>Type of crash </li></ul><ul><ul><li>Front / Side / Rear / Pedestrian / etc. </li></ul></ul><ul><li>Pre crash events </li></ul><ul><li>Delta V </li></ul><ul><li>Vehicle integrity </li></ul><ul><ul><li>Electrical / Physical </li></ul></ul>
  10. 12. Correlation of Data Sources <ul><li>EDR data </li></ul><ul><li>Vehicle damage data </li></ul><ul><li>Site data </li></ul><ul><li>Pre impact data </li></ul><ul><li>Impact data </li></ul><ul><li>Post impact data </li></ul>
  11. 13. Technology Challenges <ul><li>LED and HID lamps do not have visible post impact damage profiles like “hot shock”. </li></ul><ul><li>Drive by wire, steer by wire, brake by wire systems eliminate traditional technology which can be examined after a crash. </li></ul>
  12. 14. Report Findings <ul><li>Are analysis and results consistent ? ? ? </li></ul><ul><ul><li>ABS Skid Marks </li></ul></ul><ul><ul><li>Electronic Controls </li></ul></ul><ul><ul><li>Non-Filament Lamps </li></ul></ul><ul><ul><li>Vehicle Damage </li></ul></ul>
  13. 15. Frye Hearing <ul><li>Data admissibility in court. </li></ul><ul><ul><li>Does this technology have validity which permits it to be accepted as evidence. </li></ul></ul><ul><ul><li>NHTSA EDR Working Groups. </li></ul></ul><ul><ul><li>History and development of EDR. </li></ul></ul>
  14. 16. Traffic Accident Reconstruction Practical Examination 2 Test Examples
  15. 17. Real World Example # 1 EDR or Conventional Analysis ? But I was pushing on the brake
  16. 18. Real World Example # 2 1 2 3 4 Basic Analysis Truck Energy (1) = Car Energy (2+3+4)
  17. 19. Real World Example # 2 Vehicle 1 = Vehicles 2+3+4 1 2 3 4
  18. 20. EDR Needs <ul><li>Standardized light vehicle data set </li></ul><ul><li>Standardized heavy vehicle data set </li></ul><ul><li>Common connector system </li></ul><ul><li>Common retrieval method </li></ul><ul><li>EDR “Policy” </li></ul>
  19. 21. EDR “Policy” Foundation <ul><li>NTSB identifies need for EDR </li></ul><ul><li>NTSB Symposiums, #1, #2, & #3 </li></ul><ul><li>NHTSA working groups, PPV + T&B </li></ul><ul><li>NHTSA EDR Petition Review </li></ul><ul><li>SAE & IEEE Committees </li></ul>
  20. 22. EDR Policy Solution <ul><li>Standardize data set </li></ul>
  21. 23. EDR Policy Benefits To Society <ul><li>Save lives, </li></ul><ul><li>Increase public confidence in transportation system, </li></ul><ul><li>Provides inherent accountability for collision vehicles, and </li></ul><ul><li>Reduces, to some extent, the complexity of collision analysis. </li></ul>
  22. 24. Questions & Comments

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