Book excerpt: This book is dedicated to research on transportation accidental injury and damage, including the pre-injury and immediate post-injury phases. It also includes studies of human, environmental and vehicular factors influencing the occurrence, type and severity of transportation accidents and injury; the design, implementation and evaluation of countermeasures; biomechanics of impact and human tolerance limits to injury; modelling and statistical analysis of accident data; policy, planning and decision-making in safety and prevention of traffic accidents.