Line Of Sight Expert Witnesses

Hampden, Massachusetts

Accident Reconstruction, Human Factors - EDR analysis, photogrammetry, nighttime visibility, speed from video, perception-reaction, vehicle dynamics, driver behavior, pedestrian crash, bicycle crash, crash simulation, motorcycle crash, roadway friction, drone mapping, occupant kinematics, scene visualization, low speed impact, line-of-sight, sensitivity analysis

Christopher is an accident reconstructionist who holds ACTAR accreditation, an Engineer‑in‑Training (EIT) designation, and certification as an Associate Ergonomics Professional  (AEP) through the Board of Certification in Professional Ergonomics (BCPE). He brings both law enforcement experience and private consulting expertise to the analysis and reconstruction of traffic collisions and related events. His firm, Rule 62 Consulting LLC, provides technical analysis, site documentation, and human factors evaluation for criminal, civil, and administrative matters. Christopher's background includes service with a state police accident reconstruction unit followed by several years in private practice. He combines investigative field experience with data‑driven modeling techniques to address questions of speed, timing, visibility, and driver perception objectively and reproducibly. Mr. Kennedy is licensed as an FAA Part 107 Remote Pilot and incorporates UAV‑based aerial imagery into scen...

Irmo, South Carolina

Human Factors, Premises Liability - Accident Prevention, Risk Management, Illumination, Conspicuity, Visual Perception, Slip resistance, Playground Safety, Premises Liability, Lighting, Line of Sight, Driver Distraction, Roadway Markings, Environmental Conditions, Slip-Trip- Fall Evaluations, Workplace Injuries, Human Factors, OSHA

Ellen Szubski, Ph.D., is the senior human factors consultant at The Warren Group. She earned a Doctor of Philosophy in Human Factors Psychology and a Master of Science in Applied Psychology from Clemson University. Ellen is also a Certified XL Tribometrist, a Certified Playground Safety Inspector (CPSI), and a Certified Associate Human Factors Professional (AHFP). Ellen worked in the Clemson Visual Perception and Performance Laboratory examining the factors contributing to the conspicuity of pedestrians and bicyclists in challenging road conditions, such as nighttime driving. She did her dissertation on “The Influence of Pedestrian Biological Motion on Time-To-Collision Estimates at Night”. Prior to entering the forensic field, Ellen planned and conducted experiments for a major bicycle manufacturer that improved bicycle conspicuity. She also conducted laser strike perception and performance studies for the Department of Defense. Ellen applies her experience in Human Factors t...