This collection of original research chapters by international scholars addresses the complementary roles of transportation and knowledge and their spatial manifestations in modern urban and regional economies. The featured studies employ the most current and sophisticated technologies, while the authors add a strong element of practical application and policy implications in each chapter. The book is organized into four major themes. The first is infrastructure and economic growth, addressing the historical and contemporary economic impacts of rail, highway and transit infrastructure. The second theme, models for transportation planning and policy, includes methods for optimal toll setting and the effect of transport costs on interregional trade. The third theme, which is the spatial structure of cities, examines processes that drive and arise from urban form, including personal interaction, shopping, commuting and residential location. The fourth theme is transformations in the knowledge economy, including growing income inequality and the role of knowledge in urban dynamics. This book will be of interest to the research communities in urban and regional economics and planning, regional science, transportation studies and the knowledge economy. With its emphasis on practical aspects, it will also be of interest to the policy community. Contributors include: B. Anderson, A.E. Andersson, C. Burke, Z. Chen, K.E. Haynes, B. Johansson, K. Kobayashi, A. Koike, Y. Konishi, T. Laitila, W.W. Ling Lo, M. Lundgren, H. Maoh, K. Matsushima, S.-i. Mun, Y. Nishiyama, Y. Ohira, M. Okumura, M. Olsson, M. Onishi, T. Otazawa, G. Ray, K. Sato, S. Segi, J-e. Sung,Y. Wan, H. Westlund, H. Yamaguchi, A. Zhang