Transportation in cities, with related environmental and social concerns, continues to be a topic of the utmost priority for urban authorities and central governments around the world. Frequently, the concern is not orderly but driven by safety crises, which take place regularly, and even the best-planned urban transport systems require considerable studies to keep them operational, well-maintained, safe and secure. On a broader front, the continuing need for better urban transport systems in general and the need for a healthier environment has led to an increased level of research around the world. This is reflected in the proceedings of the Thirteenth International Conference on Urban Transport and the Environment in the 21st Century, which stresses the continuous steady growth and research into the urban transport systems control aspects, information and simulation systems.All these topics continue to be of importance for analyzing the complex inter-relation of the urban transport environment and for establishing action strategies for transport and traffic problems.Of interest to engineers, scientists and managers working in industry, universities, research organizations and government involved in the planning and management of urban transportation systems and transport policy, this book contains papers within the following subject areas: Environmental and ecological considerations; Information systems and GPS applications; Intelligent transport systems; Intermodel passenger transport systems; Land use and transport integration; Modality in freight; Public transport systems; Road pricing; Traffic management; Transport automation; Transport logistics and operations research; Transport modelling and simulation; Transport security and safety; Transport sustainability; Transport technology; and, Urban transport planning.