“…The observed rise in mobility, especially over the past half century, has increased society's exposure to potential travel risks (Haight, 1984;Andrey, 2000;WHO, 2004). At the same time, however, improvements in emergency medicine, evolving driving norms, numerous safety interventions, and socio-demographic shifts have resulted in a significant and sustained downward trend in casualty rates in most OECD countries (Chu, 1999;Page, 2001).…”