I have 50 years of experience in the field of off-highway vehicles such as snowmobiles, all terrain vehicles (ATVs), quads, motorcycle dirt bikes, utility terrain vehicles (UTVs), with specific knowledge of training, safety, accident reconstruction, trail design, maintenance and construction, human factors, race course design, mechanics, research and development, and off highway vehicle (OHV) facilities practices and safety training procedures. I have published on such topics as OHV riding safety and have testified on human factors, ergonomics, trail design and off-road riding area safety, OHV facility practices, off-road rider and facility negligence and riding technique. I have served as expert in 18 personal injury and wrongful death cases.