Human Factors Analysis

Human Factors Analysis

In many accident reconstruction cases, key questions need to be answered involving some aspect of human behavior: reaction times (and delays), perception, visibility, impairment (alcohol, drugs and/or fatigue).  A human factor analysis assesses the human role in the crash sequence.

The human operator or pedestrian is the thinking part of a transportation system.  The human decisions in this thinking process involve three main purposes:

  1. To follow a route:  The observations, decisions and operations required to go from a trip’s origin to its destination.
  2. To plan driving strategy:  Adjusting departure time, speed, position, and direction of motion; giving signals of intent to turn or slow; making any maneuvers that increase or decrease the likelihood of success in avoiding a hazard.
  3. To devise driving tactics:  Actions taken to avoid a hazardous situation (e.g.: steering, braking, accelerating, etc.) to avoid a mishap.  In today’s more advanced vehicles, some evasive tactics may be taken by the on-board computer in the vehicle, which may engage evasive tactics without driver input.

To a large extent, how well a person performs these three tasks, especially the last two, determines the risks he or she encounters in their travels.  Failure predisposes a traveler to situations in which no evasive tactics can be completely successful in avoiding a mishap.

Potential modifiers for human behavior in a human factor analysis that may influence driver perception, response or strategy may include:

  • Fatigue, boredom, irritants
  • Emotional upset
  • Illness or injury
  • Pressure, stress, hurry, preoccupation
  • Ingestion or inhalation
  • Alcohol
  • Passenger interaction
  • Sun, wind, wave exposure (issues relating to watercraft and marine incidents)
  • Experience and training
  • Driving distractions including electronic systems on or within the vehicle (GPS, Cell Phone, vehicle displays/controls, texting, system overloads etc.)
  • Age
  • Prosthetic devices

Human Factors Experts

Introtech reconstruction staff have a wide variety of education in the field of Human Factors including:

  • Investigating Human Fatigue Factors
  • Human Factors and Visibility Concepts Hampering Perception/Reaction Times
  • Night Visibility and Human Factors
  • Human Factors in Aviation Safety
  • Human Factors for Traffic Accident Reconstruction
  • Aging and Driving Symposium [Human factors related to youth and aging]
  • Human Vehicle Environment (HVE) Forum
  • Driver Distraction
  • BAC Verifier Training
  • Psycho-Physical Testing for DUI
  • DUI Case Law & Standardized Field Sobriety Testing
  • Alcohol Detection and Prosecution, effects on the human body
  • Forensic Toxicology and Ohio Law
  • Emergency Vehicle and Pursuit Driving
  • Traffic Control Devices