I have reconstructed approximately 2800 motor vehicle collisions since 1974. Some have been as a result of my duties with the Oklahoma Highway Patrol; however, most have been as a private consultant to various law firms and insurance companies across the country. I have reconstructed collisions in Oklahoma, Kansas, Missouri, Nebraska, Arkansas, Texas, Mississippi, Tennessee, Kentucky, Georgia, Iowa, New York, Arizona, Louisiana, and New Mexico. I have been qualified as an expert witness in both State and Federal courts. I have provided testimony both by deposition and at trial on motor vehicle dynamics, damage and injury relationship, conspicuity, traffic engineering, time and distance, line of sight, highway signing and maintenance, CDR analysis, State and Federal regulations concerning motor carriers, railroad grade crossing regulations, human behavior, product liability issues and product warning labels. Product liability issues have dealt with the crash worthiness of motor vehicles, seatbelts, child passenger restraints, brake systems, tires, suspension systems, fuel tanks, lights, seats, axles, roof crush, door latches and adequacy of product warning labels.