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Tab #2

Tab #2. Elements of a Traffic Crash Elements of Investigation Interview Techniques. Possible Perception and Perception Scanning Ahead to Identify Hazards. Possible Perception- Limited by Highway Geometry. Possible Perception & Perception-Limited by Topography.

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Tab #2

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  1. Tab #2 Elements of a Traffic Crash Elements of Investigation Interview Techniques

  2. Possible Perception and Perception Scanning Ahead to Identify Hazards

  3. PossiblePerception- Limited by Highway Geometry

  4. Possible Perception & Perception-Limited by Topography

  5. Encroachmentinto an adjacent lane

  6. Start of Evasive Action

  7. Initial Contact and Maximum Engagement

  8. DistributedConcentrated Maximum Engagement

  9. Final Rest Classify by How the Vehicle Arrived at Its Final Resting Point

  10. Elements of Investigation: “H-V-E” Human Vehicle Environment

  11. Factors and Conditions Relating to the Crash… Behavior Occupant Motion Personal Injury Condition Impairment Seat belt usage? Passenger Injury Behavior Driver Interview Passenger(s)

  12. Human Factors A Focus on the Role that Humans Have Drivers and passengers Witnesses Response personnel

  13. Human Factors Focus on the Driver and Passenger • Identification and contact information • Basic Review of Incident • Injuries Received • What alerted them to the impending crash

  14. Human Factors Focus on Independent Witnesses • Identification and contact information • What they saw • Where were they when they saw the crash • What alerted them to the collision • Any relationship to accident participants

  15. Human Factors Focus on Response Personnel • Fire Department • EMS Personnel • Law Enforcement Personnel • Motor Carrier Enforcement Personnel • Tow truck drivers • News Media (photojournalists, TV)

  16. Vehicle Factors

  17. Factors and Conditions Relating to the Crash… Vehicle Design Angle of Impact Exterior Damage Pre-trip Inspection Speed at Impact Interior Damage Load Securement Position at Impact Occupant Ejection Final Rest

  18. Vehicle • Vehicle dimensions, specifications, equipment and load • Vehicle damage • Direct or contact • Indirect or induced • Undamaged areas • Vehicle mechanical condition

  19. Vehicle Damage – Impact Angle

  20. Vehicle Damage – PDOF and Overlap

  21. Vehicle Damage – Occupant PDOF

  22. Vehicle Condition – Loading

  23. Environmental Factors

  24. Environment • Focuses on the general area where the crash occurred • Includes the physical evidence at the scene that was created prior to and from the collision • Includes the highway geometry • Includes the weather conditions

  25. Factors and Conditions Relating to the Crash… Highway Design Physical Evidence Damage to Road Surface Condition Debris Impact Location Time of Day Tire Marks Direction of Travel Traffic Control Dev. Gouges

  26. Environment – Physical Evidence

  27. Environment – Physical Evidence

  28. Environment – Highway Geometry

  29. Documenting Highway Geometry Topography LandUse HwyFixtures Grade Curvature LaneandshoulderWidths Traffic Control Devices Cross-slope SurfaceCondition Surface Type

  30. Environment – Weather Conditions How far could you see?

  31. Environment- Road Surface Condition Document the presence of snow, snow-pack, ice and evidence of sand/salt/plowing activities on the highway.

  32. Interviewing • Prepare for the Interview • Outline or Script Areas of Questions • Identify the “who, what, when, where and how” questions that you will be asking • Listen During the Interview

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