Abstract
The number of motorized vehicles is climbing exponentially in developing countries, and so is the number of people killed in accidents involving those vehicles. Traffic crashes in poorer nations tend to be fatal more often than those in developed countries because they often involve pedestrians and riders in less protected vehicles such as rickshaws, bicycles, or motorcycles. Such accidents are now a leading cause of death in the developing world, and policy makers and citizen advocates are searching for effective ways to help solve this growing public health problem.