Traffic injury is a distinct field of academic inquiry and public health research focused on physical harm sustained by individuals involved in road traffic crashes or incidents. It systematically investigates the epidemiology, mechanisms of injury, contributing risk factors (including environmental, behavioral, and vehicle-related factors), prevention strategies, treatment outcomes, and societal burden of injuries and fatalities resulting from transportation on public roadways, often employing a multidisciplinary approach to develop evidence-based interventions aimed at reducing morbidity and mortality.