All too often the costs of this model are neglected. Today, more than one million people die each year as a result of road traffic injuries — more than 90% of them in developing countries. Another million are estimated to die as a result of air pollution linked to vehicle emissions. Meanwhile, as any resident of Bangkok will attest, the cars that have arrived with rising prosperity crawl along over-crowded roads. Traffic congestion typically wipes 1-2% off GDP in emerging market mega-cities. Too add insult to injury, vehicles are among the most fastest growth sources of greenhouse gas emissions.