Arizona commercial vehicle expert witnesses analyze truck, bus, and fleet operations across I-10 and I-17 corridors serving Phoenix and Tucson distribution hubs. They often come from commercial trucking safety, fleet management, accident reconstruction, and DOT compliance roles. Their Arizona experience reflects desert heat impacts, long-haul freight patterns, and regional maintenance practices. They evaluate crash causation, braking and visibility, driver fatigue, inspections, and regulatory adherence.