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Specialties & Experience of this Expert Witness

General Specialties:

Motorcycle and Human Factors

Keywords/Search Terms:

human factors, biomechanics, accident reconstruction, motorcycle accident, motorcycle crash, motorcycle riding, motorcycle handling, motorcycle inspection, motorcycle testing, bicycle, e-bike, scooter, car crash auto accident, brain injury, head injury, TBI, helmet, helmet testing, motorcycle helmet


PhD, Loughborough University, England; B.Sc.(Hons), Loughborough University, England

Years in Practice:


Number of Times Deposed/Testified in Last 4 Yrs:


Additional Information

John Lloyd, PhD, CPE, ACTAR is a distinguished authority in motorcycle accident reconstruction, injury biomechanics and human factors analysis, with 30+ of testifying experience. As a motorcyclist with more than 40 years of riding and advanced training, his understanding of the unique dynamics involved in motorcycle crashes sets him apart as a true specialist in the field. Dr. Lloyd has been qualified to provide biomechanical analyses of various incidents, including: . Motorcycle Crashes / Accident Reconstruction . Injury Biomechanics . Human Factors . Motorcycle handling and operation . Motorcycle inspection and testing . Motorcycle helmets . Biomechanics of Head and Brain Injury . Football helmets . Automobile accidents . Truck accidents Dr. Lloyd earned a Ph.D. in Ergonomics (Human Factors Engineering) with a specialization in biomechanics from Loughborough University in England. He has practiced in the field of biomechanics for over 30 years, and has been board certified through the Board of Certification in Professional Ergonomics since 1995. He is also an ACTAR Accredited Traffic Accident Reconstructionist and holds 11 specialty certifications in motor vehicle accident and motorcycle reconstruction. Applicable professional memberships have included: American Academy of Neurology – Research Scientist; American Academy of Forensic Sciences - Fellow; American Biomechanics Society; American Society Mechanical Engineering; Academy of Certified Brain Injury Specialists (former); ASTM Committee F08 on Sports Equipment, Playing Surfaces and Facilities; Board of Certification in Professional Ergonomics (#725); Human Factors and Ergonomics Society; National Neurotrauma Society (former); International Brain Injury Association; The Ergonomics Society (former); Sigma Xi Research Society; Airborne Public Safety Association; National Association of Traffic Accident Reconstructionists and Investigators; Society of Accident Reconstructionists. John served as a senior researcher in biomechanics and the Director of the Biomechanics and Traumatic Brain Injury Research laboratories at the VA Research Center of Excellence in Tampa, Florida for 20 years. Additionally, he held a courtesy appointment as Assistant Professor in the University of South Florida College of Engineering from 2002-2022. Dr. Lloyd’s professional work has been published in six book chapters and 33 scientific articles in peer-reviewed journals, as well as presented at more than 100 national and international conferences. His expertise in human factors, biomechanics and accident reconstruction has been recognized and admitted by civil and criminal courts throughout the United States and Great Britain, in which he has provided testimony on more than 170 occasions.