Motorization is transforming cities and even rural areas of the developing world. The economic and social benefits are enormous. It provides individual flexible transportation in urban areas and reduced manual labor and improved market access in rural areas. In the longer term, however, motorization may stifle local development, increase pollution, and create unprecedented safety hazards. Without careful attention to the motorization process, disaster looms for cities of the developing world-- disaster from which the industrialized countries cannot be isolated.