Transportation infrastructure

In the past several U.S. presidential elections, candidates have promised to fix the country's transportation. A strong transportation system is the base of a society's economic stability and development. It can impact its health, wealth, and growth. Why then, are so many of the roads, bridges, and rail systems virtually unchanged from the last century? When will the country's transportation infrastructure catch up to the technology, living habits, and needs of a twenty-first-century population? The viewpoints in this volume explore the importance of transportation infrastructure, why it seems so difficult to maintain, and hopes for its future.