There is no centralized global or national database quantifying accidents caused solely by tourists. The causality is muddied by multiple factors:
Studies in specific contexts (e.g., rental car crashes in Hawaii, scooter injuries in Bali, pedestrian fatalities in Orlando) show elevated rates for visitors vs. residents, but methodologies vary. The WHO notes road traffic injuries are the #1 killer of young travelers abroad. Better data requires standardized reporting (tourist flag in police/hospital records) and disclosure by rental/ride-hail platforms.